diff --git a/ants_benchmark_test.go b/ants_benchmark_test.go
index b6c67ed..416f2a7 100644
--- a/ants_benchmark_test.go
+++ b/ants_benchmark_test.go
@@ -31,21 +31,9 @@ import (
 )
 
 const (
-	_   = 1 << (10 * iota)
-	KiB // 1024
-	MiB // 1048576
-	GiB // 1073741824
-	TiB // 1099511627776             (超过了int32的范围)
-	PiB // 1125899906842624
-	EiB // 1152921504606846976
-	ZiB // 1180591620717411303424    (超过了int64的范围)
-	YiB // 1208925819614629174706176
-)
-const (
-	RunTimes = 10000000
-	Param    = 100
-	AntsSize = 1000
-	TestSize = 10000
+	RunTimes      = 10000000
+	benchParam    = 10
+	benchAntsSize = 100000
 )
 
 func demoFunc() error {
@@ -68,12 +56,29 @@ func demoPoolFunc(args interface{}) error {
 
 func BenchmarkGoroutineWithFunc(b *testing.B) {
 	var wg sync.WaitGroup
+	for i := 0; i < b.N; i++ {
+		wg.Add(RunTimes)
+		for j := 0; j < RunTimes; j++ {
+			go func() {
+				demoPoolFunc(benchParam)
+				wg.Done()
+			}()
+		}
+		wg.Wait()
+	}
+}
+
+func BenchmarkSemaphoreWithFunc(b *testing.B) {
+	var wg sync.WaitGroup
+	sema := make(chan struct{}, benchAntsSize)
 
 	for i := 0; i < b.N; i++ {
+		wg.Add(RunTimes)
 		for j := 0; j < RunTimes; j++ {
-			wg.Add(1)
+			sema <- struct{}{}
 			go func() {
-				demoPoolFunc(Param)
+				demoPoolFunc(benchParam)
+				<-sema
 				wg.Done()
 			}()
 		}
@@ -83,39 +88,54 @@ func BenchmarkGoroutineWithFunc(b *testing.B) {
 
 func BenchmarkAntsPoolWithFunc(b *testing.B) {
 	var wg sync.WaitGroup
-	p, _ := ants.NewPoolWithFunc(AntsSize, func(i interface{}) error {
+	p, _ := ants.NewPoolWithFunc(benchAntsSize, func(i interface{}) error {
 		demoPoolFunc(i)
 		wg.Done()
 		return nil
 	})
 	defer p.Release()
 
-	b.ResetTimer()
+	b.StartTimer()
 	for i := 0; i < b.N; i++ {
+		wg.Add(RunTimes)
 		for j := 0; j < RunTimes; j++ {
-			wg.Add(1)
-			p.Serve(Param)
+			p.Serve(benchParam)
 		}
 		wg.Wait()
 		//b.Logf("running goroutines: %d", p.Running())
 	}
+	b.StopTimer()
 }
 
 func BenchmarkGoroutine(b *testing.B) {
 	for i := 0; i < b.N; i++ {
 		for j := 0; j < RunTimes; j++ {
-			go demoPoolFunc(Param)
+			go demoPoolFunc(benchParam)
+		}
+	}
+}
+
+func BenchmarkSemaphore(b *testing.B) {
+	sema := make(chan struct{}, benchAntsSize)
+	for i := 0; i < b.N; i++ {
+		for j := 0; j < RunTimes; j++ {
+			sema <- struct{}{}
+			go func() {
+				demoPoolFunc(benchParam)
+				<-sema
+			}()
 		}
 	}
 }
 
 func BenchmarkAntsPool(b *testing.B) {
-	p, _ := ants.NewPoolWithFunc(AntsSize, demoPoolFunc)
+	p, _ := ants.NewPoolWithFunc(benchAntsSize, demoPoolFunc)
 	defer p.Release()
-	b.ResetTimer()
+	b.StartTimer()
 	for i := 0; i < b.N; i++ {
 		for j := 0; j < RunTimes; j++ {
-			p.Serve(Param)
+			p.Serve(benchParam)
 		}
 	}
+	b.StopTimer()
 }
diff --git a/ants_test.go b/ants_test.go
index 3fb42a0..2ced83d 100644
--- a/ants_test.go
+++ b/ants_test.go
@@ -31,7 +31,25 @@ import (
 	"github.com/panjf2000/ants"
 )
 
-var n = 100000
+const (
+	_   = 1 << (10 * iota)
+	KiB // 1024
+	MiB // 1048576
+	GiB // 1073741824
+	TiB // 1099511627776             (超过了int32的范围)
+	PiB // 1125899906842624
+	EiB // 1152921504606846976
+	ZiB // 1180591620717411303424    (超过了int64的范围)
+	YiB // 1208925819614629174706176
+)
+
+const (
+	Param    = 100
+	AntsSize = 1000
+	TestSize = 10000
+	n        = 100000
+)
+
 var curMem uint64
 
 func TestAntsPoolWithFunc(t *testing.T) {
@@ -51,7 +69,7 @@ func TestAntsPoolWithFunc(t *testing.T) {
 	t.Logf("pool with func, running workers number:%d", p.Running())
 	mem := runtime.MemStats{}
 	runtime.ReadMemStats(&mem)
-	curMem = mem.TotalAlloc / MiB - curMem
+	curMem = mem.TotalAlloc/MiB - curMem
 	t.Logf("memory usage:%d MB", curMem)
 }
 func TestNoPool(t *testing.T) {
@@ -130,4 +148,4 @@ func TestCodeCov(t *testing.T) {
 	p.ReSize(TestSize)
 	p.ReSize(AntsSize)
 	t.Logf("pool with func, after resize, capacity:%d, running:%d", p.Cap(), p.Running())
-}
\ No newline at end of file
+}