Optimize DashedHexFormatter

phatboyg · Jan 7, 2023 · 57b3467 · 57b3467
1 parent 8777158
commit 57b3467
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Showing 3 changed files with 5 additions and 558 deletions.
diff --git a/src/NewId/NewIdFormatters/DashedHexFormatter.cs b/src/NewId/NewIdFormatters/DashedHexFormatter.cs
@@ -128,13 +128,12 @@ private static void EncodeVector256(Span<char> span, (byte[] bytes, bool, char _
             var spanBytes = MemoryMarshal.Cast<char, byte>(charSpan);
             IntrinsicsHelper.Vector256ToCharUtf16(a2, spanBytes);
 
-            spanBytes[32] = hexVec.GetElement(14);
-            spanBytes[34] = hexVec.GetElement(15);
+            var shuffleSpare = Avx2.Shuffle(hexVec, Vector256.Create((byte)14, 0xFF, 15, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 12, 0xFF, 13, 0xFF, 14, 0xFF, 15, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF));
+            var byte1415 = shuffleSpare.AsUInt32().GetElement(0);
+            MemoryMarshal.Write(spanBytes[32..], ref byte1415);
 
-            spanBytes[64] = hexVec.GetElement(28);
-            spanBytes[66] = hexVec.GetElement(29);
-            spanBytes[68] = hexVec.GetElement(30);
-            spanBytes[70] = hexVec.GetElement(31);
+            var byte2731 = shuffleSpare.AsUInt64().GetElement(2);
+            MemoryMarshal.Write(spanBytes[64..], ref byte2731);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]

diff --git a/tests/NewId.Tests/NewId.Tests.csproj b/tests/NewId.Tests/NewId.Tests.csproj
@@ -12,9 +12,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <Content Include="guids.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
     <Content Include="texts.txt">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>