golang锁竞争性能 golang锁竞争性能

【golang锁竞争性能】闲来没事，便试着测试了下golang的锁的性能。代码如下：

package mainimport ( "fmt" "os" "strconv" "sync" "time" )var lock sync.Mutex var count = 1func work() { for { lock.Lock() count++ lock.Unlock() } }func main() { nthread := 1 if len(os.Args) > 1 { nthread, _ = strconv.Atoi(os.Args[1]) }for i := 0; i < nthread; i++ { go work() } old := 0 last := time.Now() for { time.Sleep(time.Second) lock.Lock() k := count lock.Unlock() now := time.Now() fmt.Println(int(float64(k-old) / (float64(now.UnixNano()-last.UnixNano()) / 1e9))) old = k last = now } }

测试结果：