43 lines
634 B
Go
43 lines
634 B
Go
|
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() {
|
||
|
|
|
||
|
|
}
|