diff --git a/g/container/gset/gset_test.go b/g/container/gset/gset_test.go
new file mode 100644
index 000000000..7ac049e00
--- /dev/null
+++ b/g/container/gset/gset_test.go
@@ -0,0 +1,73 @@
+// Copyright 2017 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://gitee.com/johng/gf.
+
+// go test *.go -bench=".*"
+
+package gset_test
+
+import (
+    "testing"
+    "strconv"
+    "gitee.com/johng/gf/g/container/gset"
+)
+
+var ints = gset.NewIntSet()
+var itfs = gset.NewInterfaceSet()
+var strs = gset.NewStringSet()
+
+func BenchmarkIntSet_Add(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        ints.Add(i)
+    }
+}
+
+func BenchmarkIntSet_Contains(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        ints.Contains(i)
+    }
+}
+
+func BenchmarkIntSet_Remove(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        ints.Remove(i)
+    }
+}
+
+func BenchmarkInterfaceSet_Add(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        itfs.Add(i)
+    }
+}
+
+func BenchmarkInterfaceSet_Contains(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        itfs.Contains(i)
+    }
+}
+
+func BenchmarkInterfaceSet_Remove(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        itfs.Remove(i)
+    }
+}
+
+func BenchmarkStringSet_Add(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        strs.Add(strconv.Itoa(i))
+    }
+}
+
+func BenchmarkStringSet_Contains(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        strs.Contains(strconv.Itoa(i))
+    }
+}
+
+func BenchmarkStringSet_Remove(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        strs.Remove(strconv.Itoa(i))
+    }
+}
\ No newline at end of file
diff --git a/g/container/gset/int_set.go b/g/container/gset/int_set.go
index 470852477..0efbeaf54 100644
--- a/g/container/gset/int_set.go
+++ b/g/container/gset/int_set.go
@@ -33,9 +33,6 @@ func (this *IntSet) Iterator(f func (v int)) {
 
 // 设置键
 func (this *IntSet) Add(item int) *IntSet {
-	if this.Contains(item) {
-		return this
-	}
 	this.mu.Lock()
 	this.m[item] = struct{}{}
 	this.mu.Unlock()
@@ -44,33 +41,11 @@ func (this *IntSet) Add(item int) *IntSet {
 
 // 批量添加设置键
 func (this *IntSet) BatchAdd(items []int) *IntSet {
-    count := len(items)
-    if count == 0 {
-        return this
-    }
-
-    todo := make([]int, 0, count)
-    this.mu.RLock()
-    for i := 0; i < count; i++ {
-        _, exists := this.m[items[i]]
-        if exists {
-            continue
-        }
-
-        todo = append(todo, items[i])
-    }
-    this.mu.RUnlock()
-
-    count = len(todo)
-    if count == 0 {
-        return this
-    }
-
-    this.mu.Lock()
-    for i := 0; i < count; i++ {
-        this.m[todo[i]] = struct{}{}
-    }
-    this.mu.Unlock()
+	this.mu.Lock()
+	for _, item := range items {
+		this.m[item] = struct{}{}
+	}
+	this.mu.Unlock()
     return this
 }
 
diff --git a/g/container/gset/interface_set.go b/g/container/gset/interface_set.go
index 85f5a482d..93f8dcc3d 100644
--- a/g/container/gset/interface_set.go
+++ b/g/container/gset/interface_set.go
@@ -32,9 +32,6 @@ func (this *InterfaceSet) Iterator(f func (v interface{})) {
 
 // 添加
 func (this *InterfaceSet) Add(item interface{}) *InterfaceSet {
-	if this.Contains(item) {
-		return this
-	}
 	this.mu.Lock()
 	this.m[item] = struct{}{}
 	this.mu.Unlock()
@@ -43,33 +40,11 @@ func (this *InterfaceSet) Add(item interface{}) *InterfaceSet {
 
 // 批量添加
 func (this *InterfaceSet) BatchAdd(items []interface{}) *InterfaceSet {
-    count := len(items)
-    if count == 0 {
-        return this
-    }
-
-    todo := make([]interface{}, 0, count)
-    this.mu.RLock()
-    for i := 0; i < count; i++ {
-        _, exists := this.m[items[i]]
-        if exists {
-            continue
-        }
-
-        todo = append(todo, items[i])
-    }
-    this.mu.RUnlock()
-
-    count = len(todo)
-    if count == 0 {
-        return this
-    }
-
-    this.mu.Lock()
-    for i := 0; i < count; i++ {
-        this.m[todo[i]] = struct{}{}
-    }
-    this.mu.Unlock()
+	this.mu.Lock()
+	for _, item := range items {
+		this.m[item] = struct{}{}
+	}
+	this.mu.Unlock()
     return this
 }
 
diff --git a/g/container/gset/string_set.go b/g/container/gset/string_set.go
index ec2c1fbf4..f50bc7a49 100644
--- a/g/container/gset/string_set.go
+++ b/g/container/gset/string_set.go
@@ -32,9 +32,6 @@ func (this *StringSet) Iterator(f func (v string)) {
 
 // 设置键
 func (this *StringSet) Add(item string) *StringSet {
-	if this.Contains(item) {
-		return this
-	}
 	this.mu.Lock()
 	this.m[item] = struct{}{}
 	this.mu.Unlock()
@@ -43,33 +40,11 @@ func (this *StringSet) Add(item string) *StringSet {
 
 // 批量添加设置键
 func (this *StringSet) BatchAdd(items []string) *StringSet {
-    count := len(items)
-    if count == 0 {
-        return this
+	this.mu.Lock()
+	for _, item := range items {
+        this.m[item] = struct{}{}
     }
-
-    todo := make([]string, 0, count)
-    this.mu.RLock()
-    for i := 0; i < count; i++ {
-        _, exists := this.m[items[i]]
-        if exists {
-            continue
-        }
-
-        todo = append(todo, items[i])
-    }
-    this.mu.RUnlock()
-
-    count = len(todo)
-    if count == 0 {
-        return this
-    }
-
-    this.mu.Lock()
-    for i := 0; i < count; i++ {
-        this.m[todo[i]] = struct{}{}
-    }
-    this.mu.Unlock()
+	this.mu.Unlock()
     return this
 }