[*] 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, 16 insertions, 17 deletions

diff --git a/src/video_core/texture_cache/texture_cache.h b/src/video_core/texture_cache/texture_cache.h
index 2564a67780..0ed65e29e9 100644
--- a/src/video_core/texture_cache/texture_cache.h
+++ b/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);
diff --git a/src/video_core/texture_cache/texture_cache_base.h b/src/video_core/texture_cache/texture_cache_base.h
index 42f1a158d9..cff300da8f 100644
--- a/src/video_core/texture_cache/texture_cache_base.h
+++ b/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