From e6bd367192108cb5f94770a59b572224b63f383d Mon Sep 17 00:00:00 2001
From: "5684185+vsariola@users.noreply.github.com"
 <5684185+vsariola@users.noreply.github.com>
Date: Wed, 25 Jun 2025 17:12:27 +0300
Subject: [PATCH] d3d11: use sync.Pool for Buffers to avoid garbage

Signed-off-by: 5684185+vsariola@users.noreply.github.com <5684185+vsariola@users.noreply.github.com>
---
 gpu/internal/d3d11/d3d11_windows.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gpu/internal/d3d11/d3d11_windows.go b/gpu/internal/d3d11/d3d11_windows.go
index f27eda75..d3a43c12 100644
--- a/gpu/internal/d3d11/d3d11_windows.go
+++ b/gpu/internal/d3d11/d3d11_windows.go
@@ -8,6 +8,7 @@ import (
 	"image"
 	"math"
 	"math/bits"
+	"sync"
 	"unsafe"
 
 	"golang.org/x/sys/windows"
@@ -89,6 +90,8 @@ type Buffer struct {
 	immutable bool
 }
 
+var bufferPool sync.Pool = sync.Pool{New: func() any { return &Buffer{} }}
+
 func init() {
 	driver.NewDirect3D11Device = newDirect3D11Device
 }
@@ -472,7 +475,9 @@ func (b *Backend) newBuffer(typ driver.BufferBinding, size int, data []byte, imm
 			return nil, err
 		}
 	}
-	return &Buffer{backend: b, buf: buf, bind: bind, size: size, resView: resView, uaView: uaView, immutable: immutable}, nil
+	buffer := bufferPool.Get().(*Buffer)
+	*buffer = Buffer{backend: b, buf: buf, bind: bind, size: size, resView: resView, uaView: uaView, immutable: immutable}
+	return buffer, nil
 }
 
 func (b *Backend) NewComputeProgram(shader shader.Sources) (driver.Program, error) {
@@ -750,6 +755,7 @@ func (b *Buffer) Release() {
 	}
 	d3d11.IUnknownRelease(unsafe.Pointer(b.buf), b.buf.Vtbl.Release)
 	*b = Buffer{}
+	bufferPool.Put(b) // Return to pool for reuse. Note: this means that you should not use the buffer after calling Release.
 }
 
 func (t *Texture) ReadPixels(src image.Rectangle, pixels []byte, stride int) error {