Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/src/runtime/rand_test.go b/src/runtime/rand_test.go
new file mode 100644
index 0000000..92d07eb
--- /dev/null
+++ b/src/runtime/rand_test.go
@@ -0,0 +1,53 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runtime_test
+
+import (
+	. "runtime"
+	"strconv"
+	"testing"
+)
+
+func BenchmarkFastrand(b *testing.B) {
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			Fastrand()
+		}
+	})
+}
+
+func BenchmarkFastrand64(b *testing.B) {
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			Fastrand64()
+		}
+	})
+}
+
+func BenchmarkFastrandHashiter(b *testing.B) {
+	var m = make(map[int]int, 10)
+	for i := 0; i < 10; i++ {
+		m[i] = i
+	}
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			for range m {
+				break
+			}
+		}
+	})
+}
+
+var sink32 uint32
+
+func BenchmarkFastrandn(b *testing.B) {
+	for n := uint32(2); n <= 5; n++ {
+		b.Run(strconv.Itoa(int(n)), func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				sink32 = Fastrandn(n)
+			}
+		})
+	}
+}