From 99571667232f4a9ed1b64452ed77fd178fc549f4 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Tue, 28 Apr 2026 21:55:52 +0200
Subject: [PATCH] Optimize `RendererAllocation` by reducing fragmentation with
 operating on power-of-2 blocks

---
 Source/Engine/Renderer/RenderList.cpp       | 2 ++
 Source/Engine/Renderer/RendererAllocation.h | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/Source/Engine/Renderer/RenderList.cpp b/Source/Engine/Renderer/RenderList.cpp
index 6687bdc97..80ad67164 100644
--- a/Source/Engine/Renderer/RenderList.cpp
+++ b/Source/Engine/Renderer/RenderList.cpp
@@ -220,6 +220,7 @@ void RenderFogData::Init(const RenderView& view, IFogRenderer* renderer)
 void* RendererAllocation::Allocate(uintptr size)
 {
     PROFILE_CPU();
+    size = AllocationUtils::AlignToPowerOf2((int32)size); // Reduce fragmentation by operating on power-of-2 blocks
     void* result = nullptr;
     MemPoolLocker.Lock();
     for (int32 i = 0; i < MemPool.Count(); i++)
@@ -240,6 +241,7 @@ void* RendererAllocation::Allocate(uintptr size)
 void RendererAllocation::Free(void* ptr, uintptr size)
 {
     PROFILE_CPU();
+    size = AllocationUtils::AlignToPowerOf2((int32)size); // Reduce fragmentation by operating on power-of-2 blocks
     MemPoolLocker.Lock();
     MemPool.Add({ ptr, size });
     MemPoolLocker.Unlock();
diff --git a/Source/Engine/Renderer/RendererAllocation.h b/Source/Engine/Renderer/RendererAllocation.h
index 30e55fbd8..80dc40b6e 100644
--- a/Source/Engine/Renderer/RendererAllocation.h
+++ b/Source/Engine/Renderer/RendererAllocation.h
@@ -4,6 +4,9 @@
 
 #include "Engine/Core/Memory/SimpleHeapAllocation.h"
 
+/// <summary>
+/// Shared pool allocator for the renderer used for large chunks of memory.
+/// </summary>
 class RendererAllocation : public SimpleHeapAllocation<RendererAllocation, 64>
 {
 public: