WriteReverse优化

xljiulang · Oct 19, 2022 · b445578 · b445578
1 parent b99ea6a
commit b445578
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/WindivertDotnet/WindivertBufferWriter.cs b/WindivertDotnet/WindivertBufferWriter.cs
@@ -31,12 +31,13 @@ public WindivertBufferWriter(WinDivertPacket packet, int offset)
         public unsafe void WriteReverse<TValue>(TValue value) where TValue : unmanaged
         {
             var valueSpan = new Span<byte>(&value, sizeof(TValue));
-            Span<byte> reverseSpan = stackalloc byte[valueSpan.Length];
+            var span = this.GetSpan(valueSpan.Length);
 
-            valueSpan.CopyTo(reverseSpan);
-            reverseSpan.Reverse();
+            // 先写入后翻转，减少必要的分配
+            valueSpan.CopyTo(span);
+            span[..valueSpan.Length].Reverse();
 
-            this.Write(reverseSpan);
+            this.Advance(valueSpan.Length);
         }
 
         /// <summary>