[ARM64/Windows] optimal value of CopyThreshold for Windows after perf…

…ormance analysis (dotnet/coreclr#14674) Commit migrated from dotnet/coreclr@33a5f24
dotnet · Oct 25, 2017 · 1458638 · 1458638
1 parent e0977a7
commit 1458638
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/coreclr/src/mscorlib/src/System/Buffer.cs b/src/coreclr/src/mscorlib/src/System/Buffer.cs
@@ -263,9 +263,9 @@ internal unsafe static void Memmove(byte* dest, byte* src, nuint len)
             const nuint CopyThreshold = 2048;
 #elif ARM64
 #if PLATFORM_WINDOWS
-            // TODO-ARM64-WINDOWS-OPT determine optimal value for Windows
+            // Determined optimal value for Windows.
             // https://github.com/dotnet/coreclr/issues/13843
-            const nuint CopyThreshold = 2048;
+            const nuint CopyThreshold = UInt64.MaxValue;
 #else // PLATFORM_WINDOWS
             // Managed code is currently faster than glibc unoptimized memmove
             // TODO-ARM64-UNIX-OPT revisit when glibc optimized memmove is in Linux distros