initial import

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>

bench/rand/bench_test.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"math/rand"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/valyala/fastrand"
+)
+
+var BenchSink uint32
+
+func BenchmarkMathRandIntn(b *testing.B) {
+	rand.Seed(time.Now().Unix())
+	b.RunParallel(func(pb *testing.PB) {
+		s := uint32(0)
+		for pb.Next() {
+			s += uint32(rand.Intn(1e6))
+		}
+		atomic.AddUint32(&BenchSink, s)
+	})
+}
+
+func BenchmarkRNGUint32nWithLock(b *testing.B) {
+	var r fastrand.RNG
+	var rMu sync.Mutex
+	b.RunParallel(func(pb *testing.PB) {
+		s := uint32(0)
+		for pb.Next() {
+			rMu.Lock()
+			s += r.Uint32n(1e6)
+			rMu.Unlock()
+		}
+		atomic.AddUint32(&BenchSink, s)
+	})
+}
+
+func main() {
+
+}