fix MiddleIndex perf tests

nietras · nietras · commit 67a5965e0efe · 2017-12-13T11:29:36.000+01:00
diff --git a/src/System.Memory/tests/Performance/Perf.Span.BinarySearch.cs b/src/System.Memory/tests/Performance/Perf.Span.BinarySearch.cs
@@ -29,7 +29,7 @@ public void SpanBinarySearch_Int_FirstIndex(int size)
         [InlineData(1000)]
         public void SpanBinarySearch_Int_MiddleIndex(int size)
         {
-            BenchmarkAndAssert(size, size / 2, size / 2);
+            BenchmarkAndAssert(size, (size - 1) / 2, (size - 1) / 2);
         }
 
         [Benchmark(InnerIterationCount = InnerCount)]
@@ -80,7 +80,7 @@ public void SpanBinarySearch_String_FirstIndex(int size)
         [InlineData(1000)]
         public void SpanBinarySearch_String_MiddleIndex(int size)
         {
-            BenchmarkAndAssert(size, (size / 2).ToString(NumberFormat), size / 2);
+            BenchmarkAndAssert(size, ((size - 1) / 2).ToString(NumberFormat), (size - 1) / 2);
         }
 
         [Benchmark(InnerIterationCount = InnerCount)]

Original file line number	Diff line number	Diff line change
`@@ -29,7 +29,7 @@ public void SpanBinarySearch_Int_FirstIndex(int size)`
`29`	`29`	`[InlineData(1000)]`
`30`	`30`	`public void SpanBinarySearch_Int_MiddleIndex(int size)`
`31`	`31`	`{`
`32`		`- BenchmarkAndAssert(size, size / 2, size / 2);`
	`32`	`+ BenchmarkAndAssert(size, (size - 1) / 2, (size - 1) / 2);`
`33`	`33`	`}`
`34`	`34`
`35`	`35`	`[Benchmark(InnerIterationCount = InnerCount)]`
`@@ -80,7 +80,7 @@ public void SpanBinarySearch_String_FirstIndex(int size)`
`80`	`80`	`[InlineData(1000)]`
`81`	`81`	`public void SpanBinarySearch_String_MiddleIndex(int size)`
`82`	`82`	`{`
`83`		`- BenchmarkAndAssert(size, (size / 2).ToString(NumberFormat), size / 2);`
	`83`	`+ BenchmarkAndAssert(size, ((size - 1) / 2).ToString(NumberFormat), (size - 1) / 2);`
`84`	`84`	`}`
`85`	`85`
`86`	`86`	`[Benchmark(InnerIterationCount = InnerCount)]`