Move index check inside update operation

Author: Alexander Gusarov

src/System.Memory/src/System/SpanHelpers.T.cs

@@ -300,14 +300,16 @@ public static int IndexOfAny<T>(ref T searchSpace, int searchSpaceLength, ref T
                 return 0;  // A zero-length sequence is always treated as "found" at the start of the search space.
 
             int index = -1;
-            for (int i = 0; i < valueLength && index != 0; i++)
+            for (int i = 0; i < valueLength; i++)
             {
                 var tempIndex = IndexOf(ref searchSpace, Unsafe.Add(ref value, i), searchSpaceLength);
                 if ((uint)tempIndex < (uint)index)
                 {
                     index = tempIndex;
                     // Reduce space for search, cause we don't care if we find the search value after the index of a previously found value
                     searchSpaceLength = tempIndex;
+
+                    if (index == 0) break;
                 }
             }
             return index;

src/System.Memory/src/System/SpanHelpers.byte.cs

@@ -61,14 +61,16 @@ public static int IndexOfAny(ref byte searchSpace, int searchSpaceLength, ref by
                 return 0;  // A zero-length sequence is always treated as "found" at the start of the search space.
 
             int index = -1;
-            for (int i = 0; i < valueLength && index != 0; i++)
+            for (int i = 0; i < valueLength; i++)
             {
                 var tempIndex = IndexOf(ref searchSpace, Unsafe.Add(ref value, i), searchSpaceLength);
                 if ((uint)tempIndex < (uint)index)
                 {
                     index = tempIndex;
                     // Reduce space for search, cause we don't care if we find the search value after the index of a previously found value
                     searchSpaceLength = tempIndex;
+
+                    if (index == 0) break;
                 }
             }
             return index;

src/System.Memory/tests/Performance/System.Memory.Performance.Tests.csproj

@@ -14,7 +14,7 @@
     <Compile Include="Perf.Span.Clear.cs" />
     <Compile Include="Perf.Span.Fill.cs" />
     <Compile Include="Perf.Span.IndexOf.cs" />
-	<Compile Include="Perf.Span.IndexOfAny.cs" />
+    <Compile Include="Perf.Span.IndexOfAny.cs" />
     <Compile Include="Perf.Span.StartsWith.cs" />
     <Compile Include="Perf.MemorySlice.cs" />
     <Compile Include="Perf.Utf8Formatter.cs" />