Imported Upstream version 1.1.0upstream/1.1.0

1 files changed, 60 insertions, 0 deletions

diff --git a/tests/src/JIT/Performance/CodeQuality/BenchI/IniArray/IniArray.cs b/tests/src/JIT/Performance/CodeQuality/BenchI/IniArray/IniArray.cs
new file mode 100644
index 0000000000..78fa233dbf
--- /dev/null
+++ b/tests/src/JIT/Performance/CodeQuality/BenchI/IniArray/IniArray.cs
@@ -0,0 +1,60 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+//
+
+using Microsoft.Xunit.Performance;
+using System;
+using System.Runtime.CompilerServices;
+using Xunit;
+
+[assembly: OptimizeForBenchmarks]
+[assembly: MeasureInstructionsRetired]
+
+public static class IniArray
+{
+
+#if DEBUG
+    public const int Iterations = 1;
+#else
+    public const int Iterations = 10000000;
+#endif
+
+    const int Allotted = 16;
+    static volatile object VolatileObject;
+
+    static void Escape(object obj) {
+        VolatileObject = obj;
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    static bool Bench() {
+        char[] workarea = new char[Allotted];
+        for (int i = 0; i < Iterations; i++) {
+            for (int j = 0; j < Allotted; j++) {
+                workarea[j] = ' ';
+            }
+        }
+        Escape(workarea);
+        return true;
+    }
+
+    [Benchmark]
+    public static void Test() {
+        foreach (var iteration in Benchmark.Iterations) {
+            using (iteration.StartMeasurement()) {
+                Bench();
+            }
+        }
+    }
+
+    static bool TestBase() {
+        bool result = Bench();
+        return result;
+    }
+    
+    public static int Main() {
+        bool result = TestBase();
+        return (result ? 100 : -1);
+    }
+}