[*] 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>

2 files changed, 10 insertions, 7 deletions

diff --git a/src/video_core/host1x/codecs/decoder.h b/src/video_core/host1x/codecs/decoder.h
index 22e6db8151..d25da81fd4 100755..100644
--- a/src/video_core/host1x/codecs/decoder.h
+++ b/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"
diff --git a/src/video_core/host1x/host1x.h b/src/video_core/host1x/host1x.h
index 98dd593185..d7534da23a 100644
--- a/src/video_core/host1x/host1x.h
+++ b/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;