[*] change all std::unordered_map and std::unordered_set into ankerl::unordered_dense::map/set variants (#3442)

mainly doing this to reduce memory footprint; we all know how nice ankerl::unordered_dense is

in theory 4x faster - in practice these maps arent that "hot" anyways so not likely to have much perf gained

i just want to reduce mem fragmentation to ease my porting process, plus it helps other platforms as well (ahem weak Mediatek devices) :)

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Co-authored-by: Caio Oliveira <caiooliveirafarias0@gmail.com>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3442
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

.patch/unordered-dense/0001-avoid-memset-when-clearing-an-empty-table.patch

@@ -0,0 +1,26 @@
+From b3622608433c183ba868a1dc8dd9cf285eb3b916 Mon Sep 17 00:00:00 2001
+From: Dario Petrillo <dario.pk1@gmail.com>
+Date: Thu, 27 Nov 2025 23:12:38 +0100
+Subject: [PATCH] avoid extra memset when clearing an empty table
+
+---
+ include/ankerl/unordered_dense.h | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/include/ankerl/unordered_dense.h b/include/ankerl/unordered_dense.h
+index 0835342..4938212 100644
+--- a/include/ankerl/unordered_dense.h
++++ b/include/ankerl/unordered_dense.h
+@@ -1490,8 +1490,10 @@ class table : public std::conditional_t<is_map_v<T>, base_table_type_map<T>, bas
+     // modifiers //////////////////////////////////////////////////////////////
+ 
+     void clear() {
+-        m_values.clear();
+-        clear_buckets();
++        if (!empty()) {
++            m_values.clear();
++            clear_buckets();
++        }
+     }
+ 
+     auto insert(value_type const& value) -> std::pair<iterator, bool> {

CMakeLists.txt

@@ -576,6 +576,7 @@ add_subdirectory(externals)
 # pass targets from externals
 find_package(enet)
 find_package(MbedTLS)
+find_package(unordered_dense REQUIRED)
 
 if (ARCHITECTURE_x86 OR ARCHITECTURE_x86_64)
     find_package(xbyak)

externals/CMakeLists.txt

@@ -66,6 +66,9 @@ if (NOT TARGET LLVM::Demangle)
     add_library(LLVM::Demangle ALIAS demangle)
 endif()
 
+# unordered_dense
+AddJsonPackage(unordered-dense)
+
 if (YUZU_STATIC_ROOM)
     return()
 endif()
@@ -244,9 +247,6 @@ if (ENABLE_WEB_SERVICE OR ENABLE_UPDATE_CHECKER)
     AddJsonPackage(cpp-jwt)
 endif()
 
-# unordered_dense
-AddJsonPackage(unordered-dense)
-
 # FFMpeg
 if (YUZU_USE_EXTERNAL_FFMPEG OR YUZU_USE_BUNDLED_FFMPEG)
     add_subdirectory(ffmpeg)

externals/cpmfile.json

@@ -91,10 +91,13 @@
     "unordered-dense": {
         "package": "unordered_dense",
         "repo": "martinus/unordered_dense",
-        "tag": "v%VERSION%",
-        "hash": "b98b5d4d96f8e0081b184d6c4c1181fae4e41723b54bed4296717d7f417348b48fad0bbcc664cac142b8c8a47e95aa57c1eb1cf6caa855fd782fad3e3ab99e5e",
+        "sha": "7b55cab841",
+        "hash": "d2106f6640f6bfb81755e4b8bfb64982e46ec4a507cacdb38f940123212ccf35a20b43c70c6f01d7bfb8c246d1a16f7845d8052971949cea9def1475e3fa02c8",
         "find_args": "CONFIG",
-        "git_version": "4.8.1"
+        "bundled": true,
+        "patches": [
+            "0001-avoid-memset-when-clearing-an-empty-table.patch"
+        ]
     },
     "mbedtls": {
         "package": "MbedTLS",

src/android/app/src/main/jni/game_metadata.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -18,7 +21,7 @@ struct RomMetadata {
     bool isHomebrew;
 };
 
-std::unordered_map<std::string, RomMetadata> m_rom_metadata_cache;
+ankerl::unordered_dense::map<std::string, RomMetadata> m_rom_metadata_cache;
 
 RomMetadata CacheRomMetadata(const std::string& path) {
     const auto file =

src/android/app/src/main/jni/native_input.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -18,7 +21,7 @@
 #include "input_common/drivers/virtual_gamepad.h"
 #include "native.h"
 
-std::unordered_map<std::string, std::unique_ptr<AndroidConfig>> map_profiles;
+ankerl::unordered_dense::map<std::string, std::unique_ptr<AndroidConfig>> map_profiles;
 
 bool IsHandheldOnly() {
     const auto npad_style_set =

src/common/CMakeLists.txt

@@ -253,7 +253,7 @@ if (lz4_ADDED)
     target_include_directories(common PRIVATE ${lz4_SOURCE_DIR}/lib)
 endif()
 
-target_link_libraries(common PUBLIC fmt::fmt stb::headers Threads::Threads)
+target_link_libraries(common PUBLIC fmt::fmt stb::headers Threads::Threads unordered_dense::unordered_dense)
 target_link_libraries(common PRIVATE lz4::lz4 LLVM::Demangle zstd::zstd)
 
 if(ANDROID)

src/common/fs/path_util.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
@@ -7,7 +7,7 @@
 #include <algorithm>
 #include <iostream>
 #include <sstream>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/assert.h"
 #include "common/fs/fs.h"
@@ -193,8 +193,8 @@ private:
         SetLegacyPathImpl(legacy_path, new_path);
     }
 
-    std::unordered_map<EdenPath, fs::path> eden_paths;
-    std::unordered_map<EmuPath, fs::path> legacy_paths;
+    ankerl::unordered_dense::map<EdenPath, fs::path> eden_paths;
+    ankerl::unordered_dense::map<EmuPath, fs::path> legacy_paths;
 };
 
 bool ValidatePath(const fs::path& path) {

src/common/host_memory.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
@@ -7,7 +7,7 @@
 #ifdef _WIN32
 
 #include <iterator>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <boost/icl/separate_interval_set.hpp>
 #include <windows.h>
 #include "common/dynamic_library.h"
@@ -391,7 +391,7 @@ private:
 
     std::mutex placeholder_mutex;                                 ///< Mutex for placeholders
     boost::icl::separate_interval_set<size_t> placeholders;       ///< Mapped placeholders
-    std::unordered_map<size_t, size_t> placeholder_host_pointers; ///< Placeholder backing offset
+    ankerl::unordered_dense::map<size_t, size_t> placeholder_host_pointers; ///< Placeholder backing offset
 };
 
 #else // ^^^ Windows ^^^ vvv POSIX vvv

src/common/input.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2017 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -6,7 +9,7 @@
 #include <functional>
 #include <memory>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 #include <vector>
 #include "common/logging/log.h"
@@ -409,7 +412,7 @@ public:
 namespace Impl {
 
 template <typename InputDeviceType>
-using FactoryListType = std::unordered_map<std::string, std::shared_ptr<Factory<InputDeviceType>>>;
+using FactoryListType = ankerl::unordered_dense::map<std::string, std::shared_ptr<Factory<InputDeviceType>>>;
 
 template <typename InputDeviceType>
 struct FactoryList {

src/common/param_package.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2017 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -5,14 +8,14 @@
 
 #include <initializer_list>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 namespace Common {
 
 /// A string-based key-value container supporting serializing to and deserializing from a string
 class ParamPackage {
 public:
-    using DataType = std::unordered_map<std::string, std::string>;
+    using DataType = ankerl::unordered_dense::map<std::string, std::string>;
 
     ParamPackage() = default;
     explicit ParamPackage(const std::string& serialized);

src/core/arm/dynarmic/arm_dynarmic_64.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -8,7 +8,7 @@
 
 #include <atomic>
 #include <memory>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include <dynarmic/interface/A64/a64.h>
 #include "common/common_types.h"

src/core/arm/nce/lru_cache.h

@@ -1,11 +1,11 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #pragma once
 #include <list>
 #include <optional>
 #include <shared_mutex>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 
 #include "common/logging/log.h"
@@ -144,7 +144,7 @@ private:
     using list_type      = std::list<key_type>;
     using list_iterator  = typename list_type::iterator;
     using map_value_type = std::pair<list_iterator, value_type>;
-    using map_type       = std::unordered_map<key_type, map_value_type>;
+    using map_type       = ankerl::unordered_dense::map<key_type, map_value_type>;
 
     template <typename V>
     void insert_or_update(const key_type& key, V&& value) {

src/core/arm/nce/patcher.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #include <span>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 #include <oaknut/code_block.hpp>
 #include <oaknut/oaknut.hpp>
@@ -46,7 +46,7 @@ enum class PatchMode : u32 {
 
 using ModuleTextAddress = u64;
 using PatchTextAddress = u64;
-using EntryTrampolines = std::unordered_map<ModuleTextAddress, PatchTextAddress>;
+using EntryTrampolines = ankerl::unordered_dense::map<ModuleTextAddress, PatchTextAddress>;
 
 class Patcher {
 public:

src/core/file_sys/vfs/vfs_layered.cpp

@@ -1,9 +1,12 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <algorithm>
 #include <set>
-#include <unordered_set>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 #include "core/file_sys/vfs/vfs_layered.h"
 
@@ -60,7 +63,7 @@ std::string LayeredVfsDirectory::GetFullPath() const {
 
 std::vector<VirtualFile> LayeredVfsDirectory::GetFiles() const {
     std::vector<VirtualFile> out;
-    std::unordered_set<std::string> out_names;
+    ankerl::unordered_dense::set<std::string> out_names;
 
     for (const auto& layer : dirs) {
         for (auto& file : layer->GetFiles()) {
@@ -76,7 +79,7 @@ std::vector<VirtualFile> LayeredVfsDirectory::GetFiles() const {
 
 std::vector<VirtualDir> LayeredVfsDirectory::GetSubdirectories() const {
     std::vector<VirtualDir> out;
-    std::unordered_set<std::string> out_names;
+    ankerl::unordered_dense::set<std::string> out_names;
 
     for (const auto& layer : dirs) {
         for (const auto& sd : layer->GetSubdirectories()) {

src/core/hle/kernel/k_process.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
@@ -78,7 +78,7 @@ private:
     std::array<DebugWatchpoint, Core::Hardware::NUM_WATCHPOINTS> m_watchpoints{};
     std::map<KProcessAddress, u64> m_debug_page_refcounts{};
 #ifdef HAS_NCE
-    std::unordered_map<u64, u64> m_post_handlers{};
+    ankerl::unordered_dense::map<u64, u64> m_post_handlers{};
 #endif
     std::unique_ptr<Core::ExclusiveMonitor> m_exclusive_monitor;
     Core::Memory::Memory m_memory;
@@ -493,7 +493,7 @@ public:
     static void Switch(KProcess* cur_process, KProcess* next_process);
 
 #ifdef HAS_NCE
-    std::unordered_map<u64, u64>& GetPostHandlers() noexcept {
+    ankerl::unordered_dense::map<u64, u64>& GetPostHandlers() noexcept {
         return m_post_handlers;
     }
 #endif

src/core/hle/kernel/kernel.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
@@ -10,7 +10,7 @@
 #include <functional>
 #include <memory>
 #include <thread>
-#include <unordered_set>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 
 #include "common/assert.h"
@@ -786,8 +786,8 @@ struct KernelCore::Impl {
 
     std::optional<KObjectNameGlobalData> object_name_global_data;
 
-    std::unordered_set<KAutoObject*> registered_objects;
-    std::unordered_set<KAutoObject*> registered_in_use_objects;
+    ankerl::unordered_dense::set<KAutoObject*> registered_objects;
+    ankerl::unordered_dense::set<KAutoObject*> registered_in_use_objects;
 
     std::mutex server_lock;
     std::vector<std::unique_ptr<Service::ServerManager>> server_managers;

src/core/hle/kernel/kernel.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
@@ -11,7 +11,7 @@
 #include <list>
 #include <memory>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/polyfill_thread.h"

src/core/hle/service/am/frontend/applet_web_browser_types.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
@@ -7,7 +7,7 @@
 #pragma once
 
 #include <array>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_funcs.h"
@@ -176,6 +176,6 @@ struct WebCommonReturnValue {
 };
 static_assert(sizeof(WebCommonReturnValue) == 0x1010, "WebCommonReturnValue has incorrect size.");
 
-using WebArgInputTLVMap = std::unordered_map<WebArgInputTLVType, std::vector<u8>>;
+using WebArgInputTLVMap = ankerl::unordered_dense::map<WebArgInputTLVType, std::vector<u8>>;
 
 } // namespace Service::AM::Frontend

src/core/hle/service/bcat/news/builtin_news.cpp

@@ -44,8 +44,8 @@ std::vector<u8> default_logo_small;
 std::vector<u8> default_logo_large;
 bool default_logos_loaded = false;
 
-std::unordered_map<std::string, std::vector<u8>> news_images_small;
-std::unordered_map<std::string, std::vector<u8>> news_images_large;
+ankerl::unordered_dense::map<std::string, std::vector<u8>> news_images_small;
+ankerl::unordered_dense::map<std::string, std::vector<u8>> news_images_large;
 std::mutex images_mutex;
 
 

src/core/hle/service/bcat/news/news_storage.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
@@ -12,7 +12,7 @@
 #include <optional>
 #include <span>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_types.h"
@@ -93,7 +93,7 @@ private:
     static s64 Now();
 
     mutable std::mutex mtx;
-    std::unordered_map<std::string, StoredNews> items;
+    ankerl::unordered_dense::map<std::string, StoredNews> items;
     size_t open_counter{};
 };
 

src/core/hle/service/caps/caps_manager.h

@@ -1,9 +1,12 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/fs/fs.h"
 #include "core/hle/result.h"
@@ -85,7 +88,7 @@ private:
     AlbumFileDateTime ConvertToAlbumDateTime(u64 posix_time) const;
 
     bool is_mounted{};
-    std::unordered_map<AlbumFileId, std::filesystem::path> album_files;
+    ankerl::unordered_dense::map<AlbumFileId, std::filesystem::path> album_files;
 
     Core::System& system;
 };

src/core/hle/service/ldn/lan_discovery.h

@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #pragma once
@@ -15,7 +15,7 @@
 #include <random>
 #include <span>
 #include <thread>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/logging/log.h"
 #include "common/socket_types.h"
@@ -119,7 +119,7 @@ protected:
     std::array<LanStation, StationCountMax> stations;
     std::array<NodeLatestUpdate, NodeCountMax> node_changes{};
     std::array<u8, NodeCountMax> node_last_states{};
-    std::unordered_map<MacAddress, NetworkInfo, MACAddressHash> scan_results{};
+    ankerl::unordered_dense::map<MacAddress, NetworkInfo, MACAddressHash> scan_results{};
     NodeInfo node_info{};
     NetworkInfo network_info{};
     State state{State::None};

src/core/hle/service/lm/lm.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -7,7 +7,7 @@
 #include <string>
 
 #include <optional>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <boost/container_hash/hash.hpp>
 #include "common/logging/log.h"
 #include "core/core.h"
@@ -331,7 +331,7 @@ private:
     };
     static_assert(sizeof(LogPacketHeader) == 0x18, "LogPacketHeader is an invalid size");
 
-    std::unordered_map<LogPacketHeaderEntry, std::vector<u8>> entries{};
+    ankerl::unordered_dense::map<LogPacketHeaderEntry, std::vector<u8>> entries{};
     LogDestination destination{LogDestination::All};
 };
 

src/core/hle/service/nifm/nifm.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -23,7 +23,7 @@
 #include <mutex>
 #include <optional>
 #include <thread>
-#include <unordered_set>
+#include <ankerl/unordered_dense.h>
 #include <common/settings.h>
 
 #ifdef _WIN32

src/core/hle/service/nvdrv/core/container.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2022 yuzu Emulator Project
 // SPDX-FileCopyrightText: 2022 Skyline Team and Contributors
 // SPDX-License-Identifier: GPL-3.0-or-later
@@ -6,7 +9,7 @@
 
 #include <deque>
 #include <memory>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "core/device_memory_manager.h"
 #include "core/hle/service/nvdrv/nvdata.h"

src/core/hle/service/nvdrv/core/nvmap.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2022 yuzu Emulator Project
 // SPDX-FileCopyrightText: 2022 Skyline Team and Contributors
 // SPDX-License-Identifier: GPL-3.0-or-later
@@ -9,7 +12,7 @@
 #include <memory>
 #include <mutex>
 #include <optional>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <assert.h>
 
 #include "common/bit_field.h"
@@ -158,7 +161,7 @@ private:
     std::list<std::shared_ptr<Handle>> unmap_queue{};
     std::mutex unmap_queue_lock{}; //!< Protects access to `unmap_queue`
 
-    std::unordered_map<Handle::Id, std::shared_ptr<Handle>>
+    ankerl::unordered_dense::map<Handle::Id, std::shared_ptr<Handle>>
         handles{};           //!< Main owning map of handles
     std::mutex handles_lock; //!< Protects access to `handles`
 

src/core/hle/service/nvdrv/devices/nvhost_as_gpu.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: 2021 yuzu Emulator Project
@@ -13,7 +13,7 @@
 #include <memory>
 #include <mutex>
 #include <optional>
-#include <unordered_set>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/address_space.h"
@@ -113,7 +113,7 @@ private:
     };
     static_assert(sizeof(IoctlRemapEntry) == 20, "IoctlRemapEntry is incorrect size");
 
-    std::unordered_set<s64_le> map_buffer_offsets{};
+    ankerl::unordered_dense::set<s64_le> map_buffer_offsets{};
 
     struct IoctlMapBufferEx {
         MappingFlags flags{}; // bit0: fixed_offset, bit2: cacheable

src/core/hle/service/nvdrv/devices/nvhost_gpu.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -210,7 +210,7 @@ private:
     NvCore::SyncpointManager& syncpoint_manager;
     NvCore::NvMap& nvmap;
     std::shared_ptr<Tegra::Control::ChannelState> channel_state;
-    std::unordered_map<DeviceFD, NvCore::SessionId> sessions;
+    ankerl::unordered_dense::map<DeviceFD, NvCore::SessionId> sessions;
     u32 channel_syncpoint;
     std::mutex channel_mutex;
 

src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.h

@@ -1,10 +1,13 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
 #include <deque>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_types.h"
@@ -128,7 +131,7 @@ protected:
     NvCore::NvMap& nvmap;
     NvCore::ChannelType channel_type;
     std::array<u32, MaxSyncPoints> device_syncpoints{};
-    std::unordered_map<DeviceFD, NvCore::SessionId> sessions;
+    ankerl::unordered_dense::map<DeviceFD, NvCore::SessionId> sessions;
 };
 }; // namespace Devices
 } // namespace Service::Nvidia

src/core/hle/service/nvdrv/devices/nvmap.h

@@ -1,10 +1,13 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
 #include <memory>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 #include "common/common_funcs.h"
 #include "common/common_types.h"
@@ -115,7 +118,7 @@ private:
 
     NvCore::Container& container;
     NvCore::NvMap& file;
-    std::unordered_map<DeviceFD, NvCore::SessionId> sessions;
+    ankerl::unordered_dense::map<DeviceFD, NvCore::SessionId> sessions;
 };
 
 } // namespace Service::Nvidia::Devices

src/core/hle/service/nvdrv/nvdrv.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2021 yuzu Emulator Project
 // SPDX-FileCopyrightText: 2021 Skyline Team and Contributors
 // SPDX-License-Identifier: GPL-3.0-or-later
@@ -9,7 +12,7 @@
 #include <memory>
 #include <span>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/common_types.h"
 #include "core/hle/service/kernel_helpers.h"
@@ -100,7 +103,7 @@ private:
     /// Id to use for the next open file descriptor.
     DeviceFD next_fd = 1;
 
-    using FilesContainerType = std::unordered_map<DeviceFD, std::shared_ptr<Devices::nvdevice>>;
+    using FilesContainerType = ankerl::unordered_dense::map<DeviceFD, std::shared_ptr<Devices::nvdevice>>;
     /// Mapping of file descriptors to the devices they reference.
     FilesContainerType open_files;
 
@@ -108,7 +111,7 @@ private:
 
     EventInterface events_interface;
 
-    std::unordered_map<std::string, std::function<FilesContainerType::iterator(DeviceFD)>> builders;
+    ankerl::unordered_dense::map<std::string, std::function<FilesContainerType::iterator(DeviceFD)>> builders;
 };
 
 void LoopProcess(Core::System& system);

src/core/hle/service/nvnflinger/hos_binder_driver_server.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -5,7 +8,7 @@
 
 #include <memory>
 #include <mutex>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/common_types.h"
 #include "core/hle/service/nvnflinger/binder.h"
@@ -36,8 +39,8 @@ private:
 
     mutable std::mutex lock;
     s32 last_id = 0;
-    std::unordered_map<s32, std::shared_ptr<android::IBinder>> binders;
-    std::unordered_map<s32, RefCounts> refcounts;
+    ankerl::unordered_dense::map<s32, std::shared_ptr<android::IBinder>> binders;
+    ankerl::unordered_dense::map<s32, RefCounts> refcounts;
 };
 
 } // namespace Service::Nvnflinger

src/core/hle/service/olsc/daemon_controller.h

@@ -4,7 +4,7 @@
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/uuid.h"
 #include "core/hle/service/cmif_types.h"
@@ -54,10 +54,10 @@ private:
         }
     };
 
-    std::unordered_map<AppKey, bool, AppKeyHash> app_auto_transfer_{};
-    std::unordered_map<Common::UUID, bool> global_auto_upload_{};
-    std::unordered_map<Common::UUID, bool> global_auto_download_{};
-    std::unordered_map<AppKey, u8, AppKeyHash> autonomy_task_status_{};
+    ankerl::unordered_dense::map<AppKey, bool, AppKeyHash> app_auto_transfer_{};
+    ankerl::unordered_dense::map<Common::UUID, bool> global_auto_upload_{};
+    ankerl::unordered_dense::map<Common::UUID, bool> global_auto_download_{};
+    ankerl::unordered_dense::map<AppKey, u8, AppKeyHash> autonomy_task_status_{};
 };
 
 } // namespace Service::OLSC

src/core/hle/service/sm/sm.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -10,7 +10,7 @@
 #include <memory>
 #include <mutex>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <concepts>
 
 #include "core/hle/kernel/k_port.h"
@@ -97,8 +97,8 @@ private:
 
     /// Map of registered services, retrieved using GetServicePort.
     std::mutex lock;
-    std::unordered_map<std::string, SessionRequestHandlerFactory> registered_services;
-    std::unordered_map<std::string, Kernel::KClientPort*> service_ports;
+    ankerl::unordered_dense::map<std::string, SessionRequestHandlerFactory> registered_services;
+    ankerl::unordered_dense::map<std::string, Kernel::KClientPort*> service_ports;
 
     /// Kernel context
     Kernel::KernelCore& kernel;

src/core/hle/service/vi/conductor.h

@@ -1,10 +1,13 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
 #include <memory>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/common_types.h"
 #include "common/polyfill_thread.h"
@@ -45,7 +48,7 @@ private:
 private:
     Core::System& m_system;
     Container& m_container;
-    std::unordered_map<u64, VsyncManager> m_vsync_managers;
+    ankerl::unordered_dense::map<u64, VsyncManager> m_vsync_managers;
     std::shared_ptr<Core::Timing::EventType> m_event;
     Common::Event m_signal;
     std::jthread m_thread;

src/core/launch_timestamp_cache.cpp

@@ -8,7 +8,7 @@
 #include <mutex>
 #include <sstream>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include <fmt/format.h>
 #include <nlohmann/json.hpp>
@@ -21,8 +21,8 @@
 namespace Core::LaunchTimestampCache {
 namespace {
 
-using CacheMap = std::unordered_map<u64, s64>;
-using CountMap = std::unordered_map<u64, u64>;
+using CacheMap = ankerl::unordered_dense::map<u64, s64>;
+using CountMap = ankerl::unordered_dense::map<u64, u64>;
 
 std::mutex g_mutex;
 CacheMap g_cache;

src/dynarmic/CMakeLists.txt

@@ -118,6 +118,7 @@ endif()
 
 find_package(fmt 8 CONFIG)
 find_package(mcl 0.1.12 REQUIRED)
+find_package(unordered_dense REQUIRED)
 
 if ("arm64" IN_LIST ARCHITECTURE OR DYNARMIC_TESTS)
     find_package(oaknut 2.0.1 CONFIG)

src/dynarmic/src/dynarmic/CMakeLists.txt

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+# SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 # SPDX-License-Identifier: GPL-3.0-or-later
 include(TargetArchitectureSpecificSources)
 
@@ -356,20 +356,10 @@ set_target_properties(dynarmic PROPERTIES
     SOVERSION ${dynarmic_VERSION_MAJOR}.${dynarmic_VERSION_MINOR}
 )
 
-if (TARGET unordered_dense::unordered_dense)
-    # weird quirk of system installs
-    target_link_libraries(dynarmic
-    PRIVATE
-        unordered_dense::unordered_dense
-    )
-endif()
-
 target_compile_options(dynarmic PRIVATE ${DYNARMIC_CXX_FLAGS})
-target_link_libraries(dynarmic
-    PUBLIC
-        fmt::fmt
-        merry::mcl
-)
+
+target_link_libraries(dynarmic PRIVATE unordered_dense::unordered_dense)
+target_link_libraries(dynarmic PUBLIC fmt::fmt merry::mcl)
 
 if (BOOST_NO_HEADERS)
     target_link_libraries(dynarmic PRIVATE Boost::variant Boost::icl Boost::pool)

src/dynarmic/tests/A64/fibonacci.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 /* This file is part of the dynarmic project.
@@ -8,7 +8,7 @@
 
 #include <array>
 #include <exception>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include <catch2/catch_test_macros.hpp>
 #include "dynarmic/common/common_types.h"
@@ -23,7 +23,7 @@ namespace {
 class MyEnvironment final : public A64::UserCallbacks {
 public:
     u64 ticks_left = 0;
-    std::unordered_map<u64, u8> memory{};
+    ankerl::unordered_dense::map<u64, u8> memory{};
 
     u8 MemoryRead8(u64 vaddr) override {
         return memory[vaddr];

src/dynarmic/tests/A64/testenv.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 /* This file is part of the dynarmic project.
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include "dynarmic/common/assert.h"
 #include "dynarmic/common/common_types.h"
 #include "dynarmic/interface/A64/a64.h"
@@ -23,7 +23,7 @@ public:
     u64 code_mem_start_address = 0;
     std::vector<u32> code_mem;
 
-    std::unordered_map<u64, u8> modified_memory;
+    ankerl::unordered_dense::map<u64, u8> modified_memory;
     std::vector<std::string> interrupts;
 
     bool IsInCodeMem(u64 vaddr) const {

src/hid_core/frontend/emulated_console.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -8,7 +11,7 @@
 #include <memory>
 #include <mutex>
 #include <optional>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/common_funcs.h"
 #include "common/common_types.h"
@@ -182,7 +185,7 @@ private:
 
     mutable std::mutex mutex;
     mutable std::mutex callback_mutex;
-    std::unordered_map<int, ConsoleUpdateCallback> callback_list;
+    ankerl::unordered_dense::map<int, ConsoleUpdateCallback> callback_list;
     int last_callback_key = 0;
 
     // Stores the current status of all console input

src/hid_core/frontend/emulated_controller.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
@@ -11,7 +11,7 @@
 #include <memory>
 #include <mutex>
 #include <shared_mutex>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_types.h"
@@ -636,7 +636,7 @@ private:
     mutable std::shared_mutex callback_mutex;
     mutable std::shared_mutex npad_mutex;
     mutable std::shared_mutex connect_mutex;
-    std::unordered_map<int, ControllerUpdateCallback> callback_list;
+    ankerl::unordered_dense::map<int, ControllerUpdateCallback> callback_list;
     int last_callback_key = 0;
 
     // Stores the current status of all controller input

src/hid_core/frontend/emulated_devices.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -7,7 +10,7 @@
 #include <functional>
 #include <memory>
 #include <mutex>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_types.h"
@@ -202,7 +205,7 @@ private:
 
     mutable std::mutex mutex;
     mutable std::mutex callback_mutex;
-    std::unordered_map<int, InterfaceUpdateCallback> callback_list;
+    ankerl::unordered_dense::map<int, InterfaceUpdateCallback> callback_list;
     int last_callback_key = 0;
 
     // Stores the current status of all external device input

src/input_common/drivers/android.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -87,7 +90,7 @@ public:
     Common::Input::ButtonNames GetUIName(const Common::ParamPackage& params) const override;
 
 private:
-    std::unordered_map<PadIdentifier, jobject> input_devices;
+    ankerl::unordered_dense::map<PadIdentifier, jobject> input_devices;
 
     /// Returns the correct identifier corresponding to the player index
     PadIdentifier GetIdentifier(const std::string& guid, size_t port) const;

src/input_common/drivers/sdl_driver.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 // SPDX-FileCopyrightText: 2018 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
@@ -570,7 +570,7 @@ SDLDriver::~SDLDriver() {
 
 std::vector<Common::ParamPackage> SDLDriver::GetInputDevices() const {
     std::vector<Common::ParamPackage> devices;
-    std::unordered_map<int, std::shared_ptr<SDLJoystick>> joycon_pairs;
+    ankerl::unordered_dense::map<int, std::shared_ptr<SDLJoystick>> joycon_pairs;
     for (const auto& [key, value] : joystick_map) {
         for (const auto& joystick : value) {
             if (!joystick->GetSDLJoystick()) {

src/input_common/drivers/sdl_driver.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2018 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -6,7 +9,7 @@
 #include <atomic>
 #include <mutex>
 #include <thread>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include <SDL.h>
 
@@ -116,7 +119,7 @@ private:
     Common::SPSCQueue<VibrationRequest> vibration_queue;
 
     /// Map of GUID of a list of corresponding virtual Joysticks
-    std::unordered_map<Common::UUID, std::vector<std::shared_ptr<SDLJoystick>>> joystick_map;
+    ankerl::unordered_dense::map<Common::UUID, std::vector<std::shared_ptr<SDLJoystick>>> joystick_map;
     std::mutex joystick_map_mutex;
 
     bool start_thread = false;

src/input_common/input_engine.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -5,7 +8,7 @@
 
 #include <functional>
 #include <mutex>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/common_types.h"
 #include "common/input.h"
@@ -267,10 +270,10 @@ protected:
 
 private:
     struct ControllerData {
-        std::unordered_map<int, bool> buttons;
-        std::unordered_map<int, u8> hat_buttons;
-        std::unordered_map<int, float> axes;
-        std::unordered_map<int, BasicMotion> motions;
+        ankerl::unordered_dense::map<int, bool> buttons;
+        ankerl::unordered_dense::map<int, u8> hat_buttons;
+        ankerl::unordered_dense::map<int, float> axes;
+        ankerl::unordered_dense::map<int, BasicMotion> motions;
         Common::Input::BatteryLevel battery{};
         Common::Input::BodyColorStatus color{};
         Common::Input::CameraStatus camera{};
@@ -298,8 +301,8 @@ private:
     bool configuring{false};
     const std::string input_engine;
     int last_callback_key = 0;
-    std::unordered_map<PadIdentifier, ControllerData> controller_list;
-    std::unordered_map<int, InputIdentifier> callback_list;
+    ankerl::unordered_dense::map<PadIdentifier, ControllerData> controller_list;
+    ankerl::unordered_dense::map<int, InputIdentifier> callback_list;
     MappingCallback mapping_callback;
 };
 

src/input_common/main.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2017 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -5,7 +8,7 @@
 
 #include <memory>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 namespace Common {
@@ -53,9 +56,9 @@ enum class InputType { None, Button, Stick, Motion, Touch };
  * Given a ParamPackage for a Device returned from `GetInputDevices`, attempt to get the default
  * mapping for the device.
  */
-using AnalogMapping = std::unordered_map<Settings::NativeAnalog::Values, Common::ParamPackage>;
-using ButtonMapping = std::unordered_map<Settings::NativeButton::Values, Common::ParamPackage>;
-using MotionMapping = std::unordered_map<Settings::NativeMotion::Values, Common::ParamPackage>;
+using AnalogMapping = ankerl::unordered_dense::map<Settings::NativeAnalog::Values, Common::ParamPackage>;
+using ButtonMapping = ankerl::unordered_dense::map<Settings::NativeButton::Values, Common::ParamPackage>;
+using MotionMapping = ankerl::unordered_dense::map<Settings::NativeMotion::Values, Common::ParamPackage>;
 
 class InputSubsystem {
 public:

src/shader_recompiler/environment.h

@@ -7,7 +7,7 @@
 #pragma once
 
 #include <array>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/common_types.h"
 #include "shader_recompiler/program_header.h"
@@ -125,9 +125,9 @@ protected:
     u32 start_address{};
     bool is_proprietary_driver{};
 public:
-    std::unordered_map<CbufWordKey, u32, CbufWordKeyHash> cbuf_word_cache;
-    std::unordered_map<HandleKey,  u32, HandleKeyHash> handle_cache;
-    std::unordered_map<const IR::Inst*, ConstBufferAddr> track_cache;
+    ankerl::unordered_dense::map<CbufWordKey, u32, CbufWordKeyHash> cbuf_word_cache;
+    ankerl::unordered_dense::map<HandleKey,  u32, HandleKeyHash> handle_cache;
+    ankerl::unordered_dense::map<const IR::Inst*, ConstBufferAddr> track_cache;
 };
 
 } // namespace Shader

src/shader_recompiler/frontend/maxwell/structured_control_flow.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
@@ -7,7 +7,7 @@
 #include <algorithm>
 #include <memory>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 #include <vector>
 
@@ -390,7 +390,7 @@ private:
                    std::optional<Node> return_label) {
         Statement* const false_stmt{pool.Create(Identity{}, IR::Condition{false}, &root_stmt)};
         Tree& root{root_stmt.children};
-        std::unordered_map<Flow::Block*, Node> local_labels;
+        ankerl::unordered_dense::map<Flow::Block*, Node> local_labels;
         local_labels.reserve(function.blocks.size());
 
         for (Flow::Block& block : function.blocks) {

src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -16,7 +19,7 @@
 #include <deque>
 #include <map>
 #include <span>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <variant>
 #include <vector>
 
@@ -50,8 +53,8 @@ struct IndirectBranchVariable {
     auto operator<=>(const IndirectBranchVariable&) const noexcept = default;
 };
 
-using Variant = std::variant<IR::Reg, IR::Pred, ZeroFlagTag, SignFlagTag, CarryFlagTag,
-                             OverflowFlagTag, GotoVariable, IndirectBranchVariable>;
+using Variant = std::variant<IR::Reg, IR::Pred, ZeroFlagTag, SignFlagTag, CarryFlagTag, OverflowFlagTag, GotoVariable, IndirectBranchVariable>;
+// TODO: majority of these require stable iterators, test with XC beforehand
 using ValueMap = std::unordered_map<IR::Block*, IR::Value>;
 
 struct DefTable {
@@ -112,6 +115,7 @@ struct DefTable {
     }
 
     std::array<ValueMap, IR::NUM_USER_PREDS> preds;
+    // TODO: Requires stable iterators
     std::unordered_map<u32, ValueMap> goto_vars;
     ValueMap indirect_branch_var;
     ValueMap zero_flag;
@@ -165,7 +169,8 @@ public:
 
     template <typename Type>
     IR::Value ReadVariable(Type variable, IR::Block* root_block) {
-        boost::container::small_vector<ReadState<Type>, 64> stack{
+        // TODO: Windows commits sodoku if you use small_vector
+        std::vector<ReadState<Type>> stack{
             ReadState<Type>(nullptr),
             ReadState<Type>(root_block),
         };
@@ -295,6 +300,7 @@ private:
         return same;
     }
 
+    // TODO: Windows dies with stack exhaustion?
     std::unordered_map<IR::Block*, std::map<Variant, IR::Inst*>> incomplete_phis;
     DefTable current_def;
 };

src/shader_recompiler/ir_opt/texture_pass.cpp

@@ -7,7 +7,7 @@
 #include <algorithm>
 #include <bit>
 #include <optional>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <tuple>
 #include <limits>
 #include <boost/container/small_vector.hpp>

src/tests/common/fibers.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -8,7 +11,7 @@
 #include <mutex>
 #include <stdexcept>
 #include <thread>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include <catch2/catch_test_macros.hpp>
@@ -36,7 +39,7 @@ public:
 
 private:
     mutable std::mutex mutex;
-    std::unordered_map<std::thread::id, u32> ids;
+    ankerl::unordered_dense::map<std::thread::id, u32> ids;
 };
 
 class TestControl1 {

src/tests/video_core/memory_tracker.cpp

@@ -3,7 +3,7 @@
 
 #include <memory>
 #include <stdexcept>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <tuple>
 #include <vector>
 #include <optional>
@@ -65,7 +65,7 @@ public:
     }
 
 private:
-    std::unordered_map<u64, int> page_table;
+    ankerl::unordered_dense::map<u64, int> page_table;
     std::vector<std::tuple<DAddr, u64, int>> calls;
     size_t update_calls = 0;
 };

src/video_core/buffer_cache/buffer_cache_base.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
@@ -14,7 +14,7 @@
 #include <mutex>
 #include <numeric>
 #include <span>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_types.h"

src/video_core/buffer_cache/memory_tracker_base.h

@@ -11,7 +11,7 @@
 #include <deque>
 #include <limits>
 #include <type_traits>
-#include <unordered_set>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 
 #include "common/alignment.h"
@@ -257,7 +257,7 @@ private:
     std::array<Manager*, NUM_HIGH_PAGES> top_tier{};
     std::deque<std::array<Manager, MANAGER_POOL_SIZE>> manager_pool;
     std::deque<Manager*> free_managers;
-    std::unordered_set<u32> cached_pages;
+    ankerl::unordered_dense::set<u32> cached_pages;
     DeviceTracker* device_tracker = nullptr;
 };
 

src/video_core/control/channel_state_cache.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: 2022 yuzu Emulator Project
@@ -10,7 +10,7 @@
 #include <limits>
 #include <mutex>
 #include <optional>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_types.h"
@@ -88,14 +88,14 @@ protected:
 
     std::deque<P> channel_storage;
     std::deque<size_t> free_channel_ids;
-    std::unordered_map<s32, size_t> channel_map;
+    ankerl::unordered_dense::map<s32, size_t> channel_map;
     std::vector<size_t> active_channel_ids;
     struct AddressSpaceRef {
         size_t ref_count;
         size_t storage_id;
         Tegra::MemoryManager* gpu_memory;
     };
-    std::unordered_map<size_t, AddressSpaceRef> address_spaces;
+    ankerl::unordered_dense::map<size_t, AddressSpaceRef> address_spaces;
     mutable std::mutex config_mutex;
 
     virtual void OnGPUASRegister([[maybe_unused]] size_t map_id) {}

src/video_core/control/scheduler.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -5,7 +8,7 @@
 
 #include <memory>
 #include <mutex>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "video_core/dma_pusher.h"
 
@@ -27,7 +30,7 @@ public:
     void DeclareChannel(std::shared_ptr<ChannelState> new_channel);
 
 private:
-    std::unordered_map<s32, std::shared_ptr<ChannelState>> channels;
+    ankerl::unordered_dense::map<s32, std::shared_ptr<ChannelState>> channels;
     std::mutex scheduling_guard;
     GPU& gpu;
 };

src/video_core/engines/maxwell_3d.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -3056,7 +3056,7 @@ public:
 
     void SetHLEReplacementAttributeType(u32 bank, u32 offset, HLEReplacementAttributeType name);
 
-    std::unordered_map<u64, HLEReplacementAttributeType> replace_table;
+    ankerl::unordered_dense::map<u64, HLEReplacementAttributeType> replace_table;
 
     static_assert(sizeof(Regs) == Regs::NUM_REGS * sizeof(u32), "Maxwell3D Regs has wrong size");
     static_assert(std::is_trivially_copyable_v<Regs>, "Maxwell3D Regs must be trivially copyable");

src/video_core/engines/sw_blitter/converter.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
@@ -7,7 +7,7 @@
 #include <array>
 #include <cmath>
 #include <span>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <bit>
 #include <numeric>
 #include "common/assert.h"
@@ -924,7 +924,7 @@ public:
 };
 
 struct ConverterFactory::ConverterFactoryImpl {
-    std::unordered_map<RenderTargetFormat, std::unique_ptr<Converter>> converters_cache;
+    ankerl::unordered_dense::map<RenderTargetFormat, std::unique_ptr<Converter>> converters_cache;
 };
 
 ConverterFactory::ConverterFactory() {

src/video_core/gpu.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -373,7 +373,7 @@ struct GPU::Impl {
     std::unique_ptr<Core::Frontend::GraphicsContext> cpu_context;
 
     std::unique_ptr<Tegra::Control::Scheduler> scheduler;
-    std::unordered_map<s32, std::shared_ptr<Tegra::Control::ChannelState>> channels;
+    ankerl::unordered_dense::map<s32, std::shared_ptr<Tegra::Control::ChannelState>> channels;
     Tegra::Control::ChannelState* current_channel;
     s32 bound_channel{-1};
 

src/video_core/gpu_logging/gpu_logging.h

@@ -10,7 +10,7 @@
 #include <set>
 #include <span>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_types.h"
@@ -154,7 +154,7 @@ private:
     mutable std::mutex ring_buffer_mutex;
 
     // Memory tracking
-    std::unordered_map<uintptr_t, MemoryAllocationEntry> memory_allocations;
+    ankerl::unordered_dense::map<uintptr_t, MemoryAllocationEntry> memory_allocations;
     mutable std::mutex memory_mutex;
 
     // Statistics

src/video_core/host1x/codecs/decoder.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -7,7 +10,7 @@
 #include <mutex>
 #include <optional>
 #include <string_view>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <queue>
 
 #include "common/common_types.h"

src/video_core/host1x/host1x.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: 2021 yuzu Emulator Project
@@ -6,8 +6,8 @@
 
 #pragma once
 
+#include <ankerl/unordered_dense.h>
 #include <unordered_map>
-#include <unordered_set>
 #include <queue>
 
 #include "common/common_types.h"
@@ -134,15 +134,15 @@ private:
         if (it == map->second.end()) {
             return {};
         }
-
+        // TODO: this "mapped" prevents us from fully embracing ankerl
         return std::move(map->second.extract(it).mapped());
     }
 
     using FramePtr = std::shared_ptr<FFmpeg::Frame>;
 
     std::mutex m_mutex{};
-    std::unordered_map<s32, std::deque<std::pair<u64, FramePtr>>> m_presentation_order;
-    std::unordered_map<s32, std::unordered_map<u64, FramePtr>> m_decode_order;
+    ankerl::unordered_dense::map<s32, std::deque<std::pair<u64, FramePtr>>> m_presentation_order;
+    ankerl::unordered_dense::map<s32, std::unordered_map<u64, FramePtr>> m_decode_order;
 
     static constexpr size_t MAX_PRESENT_QUEUE = 100;
     static constexpr size_t MAX_DECODE_MAP = 200;
@@ -218,7 +218,7 @@ private:
     Tegra::MemoryManager gmmu_manager;
     std::unique_ptr<Common::FlatAllocator<u32, 0, 32>> allocator;
     FrameQueue frame_queue;
-    std::unordered_map<s32, std::unique_ptr<CDmaPusher>> devices;
+    ankerl::unordered_dense::map<s32, std::unique_ptr<CDmaPusher>> devices;
 #ifdef YUZU_LEGACY
     std::once_flag nvdec_first_init;
     std::once_flag vic_first_init;

src/video_core/macro.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
@@ -7,7 +7,7 @@
 #pragma once
 
 #include <memory>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 #include "common/bit_field.h"
 #include "common/common_types.h"
@@ -147,8 +147,8 @@ private:
         bool has_hle_program{};
     };
 
-    std::unordered_map<u32, CacheInfo> macro_cache;
-    std::unordered_map<u32, std::vector<u32>> uploaded_macro_code;
+    ankerl::unordered_dense::map<u32, CacheInfo> macro_cache;
+    ankerl::unordered_dense::map<u32, std::vector<u32>> uploaded_macro_code;
     std::optional<HLEMacro> hle_macros;
     Engines::Maxwell3D& maxwell3d;
     bool is_interpreted;

src/video_core/query_cache.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -12,8 +15,7 @@
 #include <memory>
 #include <mutex>
 #include <optional>
-#include <unordered_map>
-#include <unordered_set>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/assert.h"
@@ -348,7 +350,7 @@ private:
 
     mutable std::recursive_mutex mutex;
 
-    std::unordered_map<u64, std::vector<CachedQuery>> cached_queries;
+    ankerl::unordered_dense::map<u64, std::vector<CachedQuery>> cached_queries;
 
     std::array<CounterStream, VideoCore::NumQueryTypes> streams;
 

src/video_core/query_cache/query_cache.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
@@ -10,7 +10,7 @@
 #include <deque>
 #include <memory>
 #include <mutex>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 
 #include "common/assert.h"

src/video_core/query_cache/query_cache_base.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -7,7 +10,7 @@
 #include <mutex>
 #include <optional>
 #include <span>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 
 #include "common/assert.h"
@@ -157,7 +160,7 @@ protected:
         }
     }
 
-    using ContentCache = std::unordered_map<u64, std::unordered_map<u32, QueryLocation>>;
+    using ContentCache = ankerl::unordered_dense::map<u64, ankerl::unordered_dense::map<u32, QueryLocation>>;
 
     void InvalidateQuery(QueryLocation location);
     bool IsQueryDirty(QueryLocation location);
@@ -165,7 +168,7 @@ protected:
     void RequestGuestHostSync();
     void UnregisterPending();
 
-    std::unordered_map<u64, std::unordered_map<u32, QueryLocation>> cached_queries;
+    ankerl::unordered_dense::map<u64, ankerl::unordered_dense::map<u32, QueryLocation>> cached_queries;
     std::mutex cache_mutex;
 
     struct QueryCacheBaseImpl;

src/video_core/renderer_opengl/gl_buffer_cache.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -8,7 +8,7 @@
 
 #include <array>
 #include <span>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/common_types.h"
 #include "video_core/buffer_cache/buffer_cache_base.h"
@@ -242,7 +242,7 @@ private:
     u32 index_buffer_offset = 0;
 
     u64 device_access_memory;
-    std::unordered_map<GPUVAddr, OGLTransformFeedback> tfb_objects;
+    ankerl::unordered_dense::map<GPUVAddr, OGLTransformFeedback> tfb_objects;
 };
 
 struct BufferCacheParams {

src/video_core/renderer_opengl/gl_shader_cache.h

@@ -1,10 +1,13 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
 #include <filesystem>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "common/common_types.h"
 #include "common/thread_worker.h"
@@ -79,8 +82,8 @@ private:
     GraphicsPipeline* current_pipeline{};
 
     ShaderContext::ShaderPools main_pools;
-    std::unordered_map<GraphicsPipelineKey, std::unique_ptr<GraphicsPipeline>> graphics_cache;
-    std::unordered_map<ComputePipelineKey, std::unique_ptr<ComputePipeline>> compute_cache;
+    ankerl::unordered_dense::map<GraphicsPipelineKey, std::unique_ptr<GraphicsPipeline>> graphics_cache;
+    ankerl::unordered_dense::map<ComputePipelineKey, std::unique_ptr<ComputePipeline>> compute_cache;
 
     Shader::Profile profile;
     Shader::HostTranslateInfo host_info;

src/video_core/renderer_opengl/gl_texture_cache.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
@@ -157,7 +157,7 @@ private:
     UtilShaders util_shaders;
     FormatConversionPass format_conversion_pass;
 
-    std::array<std::unordered_map<GLenum, FormatProperties>, 3> format_properties;
+    std::array<ankerl::unordered_dense::map<GLenum, FormatProperties>, 3> format_properties;
     bool has_broken_texture_view_formats = false;
 
     OGLTexture null_image_1d_array;

src/video_core/renderer_vulkan/vk_pipeline_cache.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -8,7 +11,7 @@
 #include <filesystem>
 #include <memory>
 #include <type_traits>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_types.h"
@@ -155,8 +158,8 @@ private:
     GraphicsPipelineCacheKey graphics_key{};
     GraphicsPipeline* current_pipeline{};
 
-    std::unordered_map<ComputePipelineCacheKey, std::unique_ptr<ComputePipeline>> compute_cache;
-    std::unordered_map<GraphicsPipelineCacheKey, std::unique_ptr<GraphicsPipeline>> graphics_cache;
+    ankerl::unordered_dense::map<ComputePipelineCacheKey, std::unique_ptr<ComputePipeline>> compute_cache;
+    ankerl::unordered_dense::map<GraphicsPipelineCacheKey, std::unique_ptr<GraphicsPipeline>> graphics_cache;
 
     ShaderPools main_pools;
 

src/video_core/renderer_vulkan/vk_query_cache.cpp

@@ -10,7 +10,7 @@
 #include <memory>
 #include <span>
 #include <type_traits>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 #include <vector>
 #include "video_core/renderer_vulkan/vk_texture_cache.h"
@@ -230,7 +230,7 @@ public:
         sync_values_stash.emplace_back();
         std::vector<HostSyncValues>* sync_values = &sync_values_stash.back();
         sync_values->reserve(num_slots_used);
-        std::unordered_map<size_t, std::pair<size_t, size_t>> offsets;
+        ankerl::unordered_dense::map<size_t, std::pair<size_t, size_t>> offsets;
         resolve_buffers.clear();
         size_t resolve_buffer_index = ObtainBuffer<true>(num_slots_used);
         resolve_buffers.push_back(resolve_buffer_index);
@@ -412,7 +412,7 @@ private:
     template <bool is_ordered, typename Func>
     void ApplyBanksWideOp(std::vector<size_t>& queries, Func&& func) {
         std::conditional_t<is_ordered, std::map<size_t, std::pair<size_t, size_t>>,
-                           std::unordered_map<size_t, std::pair<size_t, size_t>>>
+                           ankerl::unordered_dense::map<size_t, std::pair<size_t, size_t>>>
             indexer;
         for (auto q : queries) {
             auto* query = GetQuery(q);
@@ -722,7 +722,7 @@ public:
 
     void SyncWrites() override {
         CloseCounter();
-        std::unordered_map<size_t, std::vector<HostSyncValues>> sync_values_stash;
+        ankerl::unordered_dense::map<size_t, std::vector<HostSyncValues>> sync_values_stash;
         for (auto q : pending_sync) {
             auto* query = GetQuery(q);
             if (True(query->flags & VideoCommon::QueryFlagBits::IsRewritten)) {

src/video_core/renderer_vulkan/vk_render_pass_cache.cpp

@@ -4,7 +4,7 @@
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include <boost/container/static_vector.hpp>
 

src/video_core/renderer_vulkan/vk_render_pass_cache.h

@@ -1,10 +1,13 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
 #include <mutex>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "video_core/surface.h"
 #include "video_core/vulkan_common/vulkan_wrapper.h"
@@ -47,7 +50,7 @@ public:
 
 private:
     const Device* device{};
-    std::unordered_map<RenderPassKey, vk::RenderPass> cache;
+    ankerl::unordered_dense::map<RenderPassKey, vk::RenderPass> cache;
     std::mutex mutex;
 };
 

src/video_core/shader_cache.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
@@ -10,7 +10,7 @@
 #include <memory>
 #include <mutex>
 #include <span>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 #include <vector>
 
@@ -148,8 +148,8 @@ private:
     mutable std::mutex lookup_mutex;
     std::mutex invalidation_mutex;
 
-    std::unordered_map<u64, std::unique_ptr<Entry>> lookup_cache;
-    std::unordered_map<u64, std::vector<Entry*>> invalidation_cache;
+    ankerl::unordered_dense::map<u64, std::unique_ptr<Entry>> lookup_cache;
+    ankerl::unordered_dense::map<u64, std::vector<Entry*>> invalidation_cache;
     std::vector<std::unique_ptr<ShaderInfo>> storage;
     std::vector<Entry*> marked_for_removal;
 };

src/video_core/shader_environment.h

@@ -14,7 +14,7 @@
 #include <optional>
 #include <span>
 #include <type_traits>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_types.h"
@@ -79,10 +79,10 @@ protected:
     GPUVAddr program_base{};
 
     std::vector<u64> code;
-    std::unordered_map<u32, Shader::TextureType> texture_types;
-    std::unordered_map<u32, Shader::TexturePixelFormat> texture_pixel_formats;
-    std::unordered_map<u64, u32> cbuf_values;
-    std::unordered_map<u64, Shader::ReplaceConstant> cbuf_replacements;
+    ankerl::unordered_dense::map<u32, Shader::TextureType> texture_types;
+    ankerl::unordered_dense::map<u32, Shader::TexturePixelFormat> texture_pixel_formats;
+    ankerl::unordered_dense::map<u64, u32> cbuf_values;
+    ankerl::unordered_dense::map<u64, Shader::ReplaceConstant> cbuf_replacements;
 
     u32 local_memory_size{};
     u32 texture_bound{};
@@ -201,10 +201,10 @@ public:
 
 private:
     std::vector<u64> code;
-    std::unordered_map<u32, Shader::TextureType> texture_types;
-    std::unordered_map<u32, Shader::TexturePixelFormat> texture_pixel_formats;
-    std::unordered_map<u64, u32> cbuf_values;
-    std::unordered_map<u64, Shader::ReplaceConstant> cbuf_replacements;
+    ankerl::unordered_dense::map<u32, Shader::TextureType> texture_types;
+    ankerl::unordered_dense::map<u32, Shader::TexturePixelFormat> texture_pixel_formats;
+    ankerl::unordered_dense::map<u64, u32> cbuf_values;
+    ankerl::unordered_dense::map<u64, Shader::ReplaceConstant> cbuf_replacements;
     std::array<u32, 3> workgroup_size{};
     u32 local_memory_size{};
     u32 shared_memory_size{};

src/video_core/texture_cache/texture_cache.h

@@ -9,7 +9,7 @@
 #include <limits>
 #include <optional>
 #include <bit>
-#include <unordered_set>
+#include <ankerl/unordered_dense.h>
 #include <boost/container/small_vector.hpp>
 
 #include "common/alignment.h"
@@ -1989,8 +1989,8 @@ SamplerId TextureCache<P>::FindSampler(const TSCEntry& config) {
     }
     const auto [pair, is_new] = channel_state->samplers.try_emplace(config);
     if (is_new) {
-        EnforceSamplerBudget();
         pair->second = slot_samplers.insert(runtime, config);
+        EnforceSamplerBudget();
     }
     return pair->second;
 }
@@ -2035,7 +2035,7 @@ void TextureCache<P>::TrimInactiveSamplers(size_t budget) {
         }
         set.insert(id);
     };
-    std::unordered_set<SamplerId> active;
+    ankerl::unordered_dense::set<SamplerId> active;
     active.reserve(channel_state->graphics_sampler_ids.size() +
                    channel_state->compute_sampler_ids.size());
     for (const SamplerId id : channel_state->graphics_sampler_ids) {
@@ -2363,9 +2363,7 @@ void TextureCache<P>::UnregisterImage(ImageId image_id) {
     image.flags &= ~ImageFlagBits::BadOverlap;
     lru_cache.Free(image.lru_index);
     const auto& clear_page_table =
-        [image_id](u64 page,
-                   std::unordered_map<u64, std::vector<ImageId>, Common::IdentityHash<u64>>&
-                       selected_page_table) {
+        [image_id](u64 page, ankerl::unordered_dense::map<u64, std::vector<ImageId>, Common::IdentityHash<u64>>& selected_page_table) {
             const auto page_it = selected_page_table.find(page);
             if (page_it == selected_page_table.end()) {
                 ASSERT_MSG(false, "Unregistering unregistered page=0x{:x}", page << YUZU_PAGEBITS);

src/video_core/texture_cache/texture_cache_base.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: 2023 yuzu Emulator Project
@@ -12,8 +12,9 @@
 #include <mutex>
 #include <span>
 #include <type_traits>
+// TODO: find out which don't require stable iters
 #include <unordered_map>
-#include <unordered_set>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 #include <boost/container/small_vector.hpp>
 #include <queue>
@@ -66,7 +67,7 @@ struct AsyncDecodeContext {
     std::atomic_bool complete;
 };
 
-using TextureCacheGPUMap = std::unordered_map<u64, std::vector<ImageId>, Common::IdentityHash<u64>>;
+using TextureCacheGPUMap = ankerl::unordered_dense::map<u64, std::vector<ImageId>, Common::IdentityHash<u64>>;
 
 class TextureCacheChannelInfo : public ChannelInfo {
 public:
@@ -85,6 +86,7 @@ public:
     std::vector<SamplerId> compute_sampler_ids;
     std::vector<ImageViewId> compute_image_view_ids;
 
+    // TODO: still relies on bad iterators :(
     std::unordered_map<TICEntry, ImageViewId> image_views;
     std::unordered_map<TSCEntry, SamplerId> samplers;
 
@@ -454,10 +456,9 @@ private:
 
     RenderTargets render_targets;
 
-    std::unordered_map<RenderTargets, FramebufferId> framebuffers;
-
-    std::unordered_map<u64, std::vector<ImageMapId>, Common::IdentityHash<u64>> page_table;
-    std::unordered_map<ImageId, boost::container::small_vector<ImageViewId, 16>> sparse_views;
+    ankerl::unordered_dense::map<RenderTargets, FramebufferId> framebuffers;
+    ankerl::unordered_dense::map<u64, std::vector<ImageMapId>, Common::IdentityHash<u64>> page_table;
+    ankerl::unordered_dense::map<ImageId, boost::container::small_vector<ImageViewId, 16>> sparse_views;
 
     DAddr virtual_invalid_space{};
 
@@ -514,7 +515,7 @@ private:
     DelayedDestructionRing<ImageView, TICKS_TO_DESTROY> sentenced_image_view;
     DelayedDestructionRing<Framebuffer, TICKS_TO_DESTROY> sentenced_framebuffers;
 
-    std::unordered_map<GPUVAddr, ImageAllocId> image_allocs_table;
+    ankerl::unordered_dense::map<GPUVAddr, ImageAllocId> image_allocs_table;
 
     Common::ScratchBuffer<u8> swizzle_data_buffer;
     Common::ScratchBuffer<u8> unswizzle_data_buffer;
@@ -531,17 +532,17 @@ private:
 
     // Join caching
     boost::container::small_vector<ImageId, 4> join_overlap_ids;
-    std::unordered_set<ImageId> join_overlaps_found;
+    ankerl::unordered_dense::set<ImageId> join_overlaps_found;
     boost::container::small_vector<ImageId, 4> join_left_aliased_ids;
     boost::container::small_vector<ImageId, 4> join_right_aliased_ids;
-    std::unordered_set<ImageId> join_ignore_textures;
+    ankerl::unordered_dense::set<ImageId> join_ignore_textures;
     boost::container::small_vector<ImageId, 4> join_bad_overlap_ids;
     struct JoinCopy {
         bool is_alias;
         ImageId id;
     };
     boost::container::small_vector<JoinCopy, 4> join_copies_to_do;
-    std::unordered_map<ImageId, size_t> join_alias_indices;
+    ankerl::unordered_dense::map<ImageId, size_t> join_alias_indices;
 };
 
 } // namespace VideoCommon

src/video_core/vulkan_common/vulkan_device.cpp

@@ -9,7 +9,7 @@
 #include <chrono>
 #include <optional>
 #include <thread>
-#include <unordered_set>
+#include <ankerl/unordered_dense.h>
 #include <utility>
 #include <vector>
 
@@ -145,7 +145,7 @@ VkFormatFeatureFlags GetFormatFeatures(VkFormatProperties properties, FormatType
     }
 }
 
-std::unordered_map<VkFormat, VkFormatProperties> GetFormatProperties(vk::PhysicalDevice physical) {
+ankerl::unordered_dense::map<VkFormat, VkFormatProperties> GetFormatProperties(vk::PhysicalDevice physical) {
     static constexpr std::array formats{
         VK_FORMAT_A1R5G5B5_UNORM_PACK16,
         VK_FORMAT_A2B10G10R10_SINT_PACK32,
@@ -287,7 +287,7 @@ std::unordered_map<VkFormat, VkFormatProperties> GetFormatProperties(vk::Physica
         VK_FORMAT_R8_USCALED,
         VK_FORMAT_S8_UINT,
     };
-    std::unordered_map<VkFormat, VkFormatProperties> format_properties;
+    ankerl::unordered_dense::map<VkFormat, VkFormatProperties> format_properties;
     for (const auto format : formats) {
         format_properties.emplace(format, physical.GetFormatProperties(format));
     }
@@ -295,7 +295,7 @@ std::unordered_map<VkFormat, VkFormatProperties> GetFormatProperties(vk::Physica
 }
 
 #if defined(ANDROID) && defined(ARCHITECTURE_arm64)
-void OverrideBcnFormats(std::unordered_map<VkFormat, VkFormatProperties>& format_properties) {
+void OverrideBcnFormats(ankerl::unordered_dense::map<VkFormat, VkFormatProperties>& format_properties) {
     // These properties are extracted from Adreno driver 512.687.0
     constexpr VkFormatFeatureFlags tiling_features{VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT |
                                                    VK_FORMAT_FEATURE_BLIT_SRC_BIT |
@@ -1612,7 +1612,7 @@ void Device::CollectToolingInfo() {
 std::vector<VkDeviceQueueCreateInfo> Device::GetDeviceQueueCreateInfos() const {
     static constexpr float QUEUE_PRIORITY = 1.0f;
 
-    std::unordered_set<u32> unique_queue_families{graphics_family, present_family};
+    ankerl::unordered_dense::set<u32> unique_queue_families{graphics_family, present_family};
     std::vector<VkDeviceQueueCreateInfo> queue_cis;
     queue_cis.reserve(unique_queue_families.size());
 

src/video_core/vulkan_common/vulkan_device.h

@@ -10,7 +10,7 @@
 #include <set>
 #include <span>
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <vector>
 
 #include "common/common_types.h"
@@ -1074,7 +1074,7 @@ private:
     std::vector<size_t> valid_heap_memory;                   ///< Heaps used.
 
     /// Format properties dictionary.
-    std::unordered_map<VkFormat, VkFormatProperties> format_properties;
+    ankerl::unordered_dense::map<VkFormat, VkFormatProperties> format_properties;
 
     /// Nsight Aftermath GPU crash tracker
     std::unique_ptr<NsightAftermathTracker> nsight_aftermath_tracker;

src/yuzu/compatibility_list.h

@@ -1,16 +1,19 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include <QString>
 
 #include "common/common_types.h"
 
-using CompatibilityList = std::unordered_map<std::string, std::pair<QString, QString>>;
+using CompatibilityList = ankerl::unordered_dense::map<std::string, std::pair<QString, QString>>;
 
 CompatibilityList::const_iterator FindMatchingCompatibilityEntry(
     const CompatibilityList& compatibility_list, u64 program_id);

src/yuzu/configuration/input_profiles.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
@@ -7,7 +7,7 @@
 #pragma once
 
 #include <string>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include "qt_common/config/qt_config.h"
 
@@ -35,5 +35,5 @@ public:
 private:
     bool ProfileExistsInMap(const std::string& profile_name) const;
 
-    std::unordered_map<std::string, std::unique_ptr<QtConfig>> map_profiles;
+    ankerl::unordered_dense::map<std::string, std::unique_ptr<QtConfig>> map_profiles;
 };

src/yuzu/loading_screen.cpp

@@ -1,7 +1,10 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 #include <QBuffer>
 #include <QByteArray>
 #include <QGraphicsOpacityEffect>

src/yuzu/loading_screen.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -77,8 +80,8 @@ private:
     std::unique_ptr<QPropertyAnimation> fadeout_animation;
 
     // Definitions for the differences in text and styling for each stage
-    std::unordered_map<VideoCore::LoadCallbackStage, const char*> progressbar_style;
-    std::unordered_map<VideoCore::LoadCallbackStage, QString> stage_translations;
+    ankerl::unordered_dense::map<VideoCore::LoadCallbackStage, const char*> progressbar_style;
+    ankerl::unordered_dense::map<VideoCore::LoadCallbackStage, QString> stage_translations;
 
     // newly generated shaders are added to the end of the file, so when loading and compiling
     // shaders, it will start quickly but end slow if new shaders were added since previous launch.

src/yuzu/multiplayer/chat_room.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 // SPDX-FileCopyrightText: Copyright 2017 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
@@ -6,8 +6,7 @@
 #pragma once
 
 #include <memory>
-#include <unordered_map>
-#include <unordered_set>
+#include <ankerl/unordered_dense.h>
 #include <QDialog>
 #include <QSortFilterProxyModel>
 #include <QStandardItemModel>
@@ -66,8 +65,8 @@ private:
     bool has_mod_perms = false;
     QStandardItemModel* player_list;
     std::unique_ptr<Ui::ChatRoom> ui;
-    std::unordered_set<std::string> block_list;
-    std::unordered_map<std::string, QPixmap> icon_cache;
+    ankerl::unordered_dense::set<std::string> block_list;
+    ankerl::unordered_dense::map<std::string, QPixmap> icon_cache;
 };
 
 Q_DECLARE_METATYPE(Network::ChatEntry);