diff --git a/.travis.yml b/.travis.yml
index 70d6eb4..a476a44 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,7 @@ install:
   - go get gopkg.in/bsm/ratelimit.v1
   - go get github.com/onsi/ginkgo
   - go get github.com/onsi/gomega
+  - go get github.com/garyburd/redigo/redis
   - mkdir -p $HOME/gopath/src/gopkg.in
   - mv $HOME/gopath/src/github.com/go-redis/redis $HOME/gopath/src/gopkg.in/redis.v3
   - cd $HOME/gopath/src/gopkg.in/redis.v3
diff --git a/README.md b/README.md
index 1388713..bd9edfc 100644
--- a/README.md
+++ b/README.md
@@ -92,6 +92,27 @@ Some corner cases:
     EVAL "return {KEYS[1],ARGV[1]}" 1 "key" "hello"
     vals, err := client.Eval("return {KEYS[1],ARGV[1]}", []string{"key"}, []string{"hello"}).Result()
 
+## Benchmark
+
+```
+BenchmarkSetGoRedis10Conns64Bytes-4 	  200000	      7184 ns/op	     210 B/op	       6 allocs/op
+BenchmarkSetGoRedis100Conns64Bytes-4	  200000	      7174 ns/op	     210 B/op	       6 allocs/op
+BenchmarkSetGoRedis10Conns1KB-4     	  200000	      7341 ns/op	     210 B/op	       6 allocs/op
+BenchmarkSetGoRedis100Conns1KB-4    	  200000	      7425 ns/op	     210 B/op	       6 allocs/op
+BenchmarkSetGoRedis10Conns10KB-4    	  200000	      9480 ns/op	     210 B/op	       6 allocs/op
+BenchmarkSetGoRedis100Conns10KB-4   	  200000	      9301 ns/op	     210 B/op	       6 allocs/op
+BenchmarkSetGoRedis10Conns1MB-4     	    2000	    590321 ns/op	    2337 B/op	       6 allocs/op
+BenchmarkSetGoRedis100Conns1MB-4    	    2000	    588935 ns/op	    2337 B/op	       6 allocs/op
+BenchmarkSetRedigo10Conns64Bytes-4  	  200000	      7238 ns/op	     208 B/op	       7 allocs/op
+BenchmarkSetRedigo100Conns64Bytes-4 	  200000	      7435 ns/op	     208 B/op	       7 allocs/op
+BenchmarkSetRedigo10Conns1KB-4      	  200000	      7635 ns/op	     208 B/op	       7 allocs/op
+BenchmarkSetRedigo100Conns1KB-4     	  200000	      7597 ns/op	     208 B/op	       7 allocs/op
+BenchmarkSetRedigo10Conns10KB-4     	  100000	     17126 ns/op	     208 B/op	       7 allocs/op
+BenchmarkSetRedigo100Conns10KB-4    	  100000	     17030 ns/op	     208 B/op	       7 allocs/op
+BenchmarkSetRedigo10Conns1MB-4      	    2000	    675397 ns/op	     226 B/op	       7 allocs/op
+BenchmarkSetRedigo100Conns1MB-4     	    2000	    669053 ns/op	     226 B/op	       7 allocs/op
+```
+
 ## Shameless plug
 
 Check my [PostgreSQL client for Go](https://github.com/go-pg/pg).
diff --git a/bench_test.go b/bench_test.go
new file mode 100644
index 0000000..dfd2bf3
--- /dev/null
+++ b/bench_test.go
@@ -0,0 +1,296 @@
+package redis_test
+
+import (
+	"bytes"
+	"testing"
+	"time"
+
+	redigo "github.com/garyburd/redigo/redis"
+
+	"gopkg.in/redis.v3"
+)
+
+func benchmarkRedisClient(poolSize int) *redis.Client {
+	client := redis.NewClient(&redis.Options{
+		Addr:         ":6379",
+		DialTimeout:  time.Second,
+		ReadTimeout:  time.Second,
+		WriteTimeout: time.Second,
+		PoolSize:     poolSize,
+	})
+	if err := client.FlushDb().Err(); err != nil {
+		panic(err)
+	}
+	return client
+}
+
+func BenchmarkRedisPing(b *testing.B) {
+	client := benchmarkRedisClient(10)
+	defer client.Close()
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			if err := client.Ping().Err(); err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}
+
+func BenchmarkRedisSet(b *testing.B) {
+	client := benchmarkRedisClient(10)
+	defer client.Close()
+
+	value := string(bytes.Repeat([]byte{'1'}, 10000))
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			if err := client.Set("key", value, 0).Err(); err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}
+
+func BenchmarkRedisGetNil(b *testing.B) {
+	client := benchmarkRedisClient(10)
+	defer client.Close()
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			if err := client.Get("key").Err(); err != redis.Nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}
+
+func benchmarkSetGoRedis(b *testing.B, poolSize, payloadSize int) {
+	client := benchmarkRedisClient(poolSize)
+	defer client.Close()
+
+	value := string(bytes.Repeat([]byte{'1'}, payloadSize))
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			if err := client.Set("key", value, 0).Err(); err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}
+
+func BenchmarkSetGoRedis10Conns64Bytes(b *testing.B) {
+	benchmarkSetGoRedis(b, 10, 64)
+}
+
+func BenchmarkSetGoRedis100Conns64Bytes(b *testing.B) {
+	benchmarkSetGoRedis(b, 100, 64)
+}
+
+func BenchmarkSetGoRedis10Conns1KB(b *testing.B) {
+	benchmarkSetGoRedis(b, 10, 1024)
+}
+
+func BenchmarkSetGoRedis100Conns1KB(b *testing.B) {
+	benchmarkSetGoRedis(b, 100, 1024)
+}
+
+func BenchmarkSetGoRedis10Conns10KB(b *testing.B) {
+	benchmarkSetGoRedis(b, 10, 10*1024)
+}
+
+func BenchmarkSetGoRedis100Conns10KB(b *testing.B) {
+	benchmarkSetGoRedis(b, 100, 10*1024)
+}
+
+func BenchmarkSetGoRedis10Conns1MB(b *testing.B) {
+	benchmarkSetGoRedis(b, 10, 1024*1024)
+}
+
+func BenchmarkSetGoRedis100Conns1MB(b *testing.B) {
+	benchmarkSetGoRedis(b, 100, 1024*1024)
+}
+
+func benchmarkSetRedigo(b *testing.B, poolSize, payloadSize int) {
+	pool := &redigo.Pool{
+		Dial: func() (redigo.Conn, error) {
+			return redigo.DialTimeout("tcp", ":6379", time.Second, time.Second, time.Second)
+		},
+		MaxActive: poolSize,
+		MaxIdle:   poolSize,
+	}
+	defer pool.Close()
+
+	value := string(bytes.Repeat([]byte{'1'}, payloadSize))
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			conn := pool.Get()
+			if _, err := conn.Do("SET", "key", value); err != nil {
+				b.Fatal(err)
+			}
+			conn.Close()
+		}
+	})
+}
+
+func BenchmarkSetRedigo10Conns64Bytes(b *testing.B) {
+	benchmarkSetRedigo(b, 10, 64)
+}
+
+func BenchmarkSetRedigo100Conns64Bytes(b *testing.B) {
+	benchmarkSetRedigo(b, 100, 64)
+}
+
+func BenchmarkSetRedigo10Conns1KB(b *testing.B) {
+	benchmarkSetRedigo(b, 10, 1024)
+}
+
+func BenchmarkSetRedigo100Conns1KB(b *testing.B) {
+	benchmarkSetRedigo(b, 100, 1024)
+}
+
+func BenchmarkSetRedigo10Conns10KB(b *testing.B) {
+	benchmarkSetRedigo(b, 10, 10*1024)
+}
+
+func BenchmarkSetRedigo100Conns10KB(b *testing.B) {
+	benchmarkSetRedigo(b, 100, 10*1024)
+}
+
+func BenchmarkSetRedigo10Conns1MB(b *testing.B) {
+	benchmarkSetRedigo(b, 10, 1024*1024)
+}
+
+func BenchmarkSetRedigo100Conns1MB(b *testing.B) {
+	benchmarkSetRedigo(b, 100, 1024*1024)
+}
+
+func BenchmarkRedisSetGetBytes(b *testing.B) {
+	client := benchmarkRedisClient(10)
+	defer client.Close()
+
+	value := bytes.Repeat([]byte{'1'}, 10000)
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			if err := client.Set("key", value, 0).Err(); err != nil {
+				b.Fatal(err)
+			}
+
+			got, err := client.Get("key").Bytes()
+			if err != nil {
+				b.Fatal(err)
+			}
+			if !bytes.Equal(got, value) {
+				b.Fatalf("got != value")
+			}
+		}
+	})
+}
+
+func BenchmarkRedisMGet(b *testing.B) {
+	client := benchmarkRedisClient(10)
+	defer client.Close()
+
+	if err := client.MSet("key1", "hello1", "key2", "hello2").Err(); err != nil {
+		b.Fatal(err)
+	}
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			if err := client.MGet("key1", "key2").Err(); err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}
+
+func BenchmarkSetExpire(b *testing.B) {
+	client := benchmarkRedisClient(10)
+	defer client.Close()
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			if err := client.Set("key", "hello", 0).Err(); err != nil {
+				b.Fatal(err)
+			}
+			if err := client.Expire("key", time.Second).Err(); err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}
+
+func BenchmarkPipeline(b *testing.B) {
+	client := benchmarkRedisClient(10)
+	defer client.Close()
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			_, err := client.Pipelined(func(pipe *redis.Pipeline) error {
+				pipe.Set("key", "hello", 0)
+				pipe.Expire("key", time.Second)
+				return nil
+			})
+			if err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}
+
+func BenchmarkZAdd(b *testing.B) {
+	client := benchmarkRedisClient(10)
+	defer client.Close()
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			if err := client.ZAdd("key", redis.Z{float64(1), "hello"}).Err(); err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}
+
+func BenchmarkPool(b *testing.B) {
+	client := benchmarkRedisClient(10)
+	defer client.Close()
+
+	pool := client.Pool()
+
+	b.ResetTimer()
+
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			conn, _, err := pool.Get()
+			if err != nil {
+				b.Fatalf("no error expected on pool.Get but received: %s", err.Error())
+			}
+			if err = pool.Put(conn); err != nil {
+				b.Fatalf("no error expected on pool.Put but received: %s", err.Error())
+			}
+		}
+	})
+}
diff --git a/conn.go b/conn.go
index 62a8bdf..e7306d9 100644
--- a/conn.go
+++ b/conn.go
@@ -65,16 +65,16 @@ func (cn *conn) init(opt *Options) error {
 }
 
 func (cn *conn) writeCmds(cmds ...Cmder) error {
-	buf := cn.buf[:0]
+	cn.buf = cn.buf[:0]
 	for _, cmd := range cmds {
 		var err error
-		buf, err = appendArgs(buf, cmd.args())
+		cn.buf, err = appendArgs(cn.buf, cmd.args())
 		if err != nil {
 			return err
 		}
 	}
 
-	_, err := cn.Write(buf)
+	_, err := cn.Write(cn.buf)
 	return err
 }
 
diff --git a/pool_test.go b/pool_test.go
index bc88c5f..2494e56 100644
--- a/pool_test.go
+++ b/pool_test.go
@@ -3,7 +3,6 @@ package redis_test
 import (
 	"errors"
 	"sync"
-	"testing"
 	"time"
 
 	. "github.com/onsi/ginkgo"
@@ -210,24 +209,3 @@ var _ = Describe("pool", func() {
 		Expect(rateErr).To(MatchError(`redis: you open connections too fast (last_error="test")`))
 	})
 })
-
-func BenchmarkPool(b *testing.B) {
-	client := benchRedisClient()
-	defer client.Close()
-
-	pool := client.Pool()
-
-	b.ResetTimer()
-
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			conn, _, err := pool.Get()
-			if err != nil {
-				b.Fatalf("no error expected on pool.Get but received: %s", err.Error())
-			}
-			if err = pool.Put(conn); err != nil {
-				b.Fatalf("no error expected on pool.Put but received: %s", err.Error())
-			}
-		}
-	})
-}
diff --git a/redis_test.go b/redis_test.go
index 8c846d0..7b5197b 100644
--- a/redis_test.go
+++ b/redis_test.go
@@ -1,9 +1,7 @@
 package redis_test
 
 import (
-	"bytes"
 	"net"
-	"testing"
 	"time"
 
 	. "github.com/onsi/ginkgo"
@@ -192,200 +190,3 @@ var _ = Describe("Client", func() {
 		Expect(cn.UsedAt.Equal(future)).To(BeTrue())
 	})
 })
-
-//------------------------------------------------------------------------------
-
-func benchRedisClient() *redis.Client {
-	client := redis.NewClient(&redis.Options{
-		Addr: ":6379",
-	})
-	if err := client.FlushDb().Err(); err != nil {
-		panic(err)
-	}
-	return client
-}
-
-func BenchmarkRedisPing(b *testing.B) {
-	client := benchRedisClient()
-	defer client.Close()
-
-	b.ResetTimer()
-
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if err := client.Ping().Err(); err != nil {
-				b.Fatal(err)
-			}
-		}
-	})
-}
-
-func BenchmarkRedisSet(b *testing.B) {
-	client := benchRedisClient()
-	defer client.Close()
-
-	value := string(bytes.Repeat([]byte{'1'}, 10000))
-
-	b.ResetTimer()
-
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if err := client.Set("key", value, 0).Err(); err != nil {
-				b.Fatal(err)
-			}
-		}
-	})
-}
-
-func BenchmarkRedisGetNil(b *testing.B) {
-	client := benchRedisClient()
-	defer client.Close()
-
-	b.ResetTimer()
-
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if err := client.Get("key").Err(); err != redis.Nil {
-				b.Fatal(err)
-			}
-		}
-	})
-}
-
-func benchmarkRedisSetGet(b *testing.B, size int) {
-	client := benchRedisClient()
-	defer client.Close()
-
-	value := string(bytes.Repeat([]byte{'1'}, size))
-
-	b.ResetTimer()
-
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if err := client.Set("key", value, 0).Err(); err != nil {
-				b.Fatal(err)
-			}
-
-			got, err := client.Get("key").Result()
-			if err != nil {
-				b.Fatal(err)
-			}
-			if got != value {
-				b.Fatalf("got != value")
-			}
-		}
-	})
-}
-
-func BenchmarkRedisSetGet64Bytes(b *testing.B) {
-	benchmarkRedisSetGet(b, 64)
-}
-
-func BenchmarkRedisSetGet1KB(b *testing.B) {
-	benchmarkRedisSetGet(b, 1024)
-}
-
-func BenchmarkRedisSetGet10KB(b *testing.B) {
-	benchmarkRedisSetGet(b, 10*1024)
-}
-
-func BenchmarkRedisSetGet1MB(b *testing.B) {
-	benchmarkRedisSetGet(b, 1024*1024)
-}
-
-func BenchmarkRedisSetGetBytes(b *testing.B) {
-	client := benchRedisClient()
-	defer client.Close()
-
-	value := bytes.Repeat([]byte{'1'}, 10000)
-
-	b.ResetTimer()
-
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if err := client.Set("key", value, 0).Err(); err != nil {
-				b.Fatal(err)
-			}
-
-			got, err := client.Get("key").Bytes()
-			if err != nil {
-				b.Fatal(err)
-			}
-			if !bytes.Equal(got, value) {
-				b.Fatalf("got != value")
-			}
-		}
-	})
-}
-
-func BenchmarkRedisMGet(b *testing.B) {
-	client := benchRedisClient()
-	defer client.Close()
-
-	if err := client.MSet("key1", "hello1", "key2", "hello2").Err(); err != nil {
-		b.Fatal(err)
-	}
-
-	b.ResetTimer()
-
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if err := client.MGet("key1", "key2").Err(); err != nil {
-				b.Fatal(err)
-			}
-		}
-	})
-}
-
-func BenchmarkSetExpire(b *testing.B) {
-	client := benchRedisClient()
-	defer client.Close()
-
-	b.ResetTimer()
-
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if err := client.Set("key", "hello", 0).Err(); err != nil {
-				b.Fatal(err)
-			}
-			if err := client.Expire("key", time.Second).Err(); err != nil {
-				b.Fatal(err)
-			}
-		}
-	})
-}
-
-func BenchmarkPipeline(b *testing.B) {
-	client := benchRedisClient()
-	defer client.Close()
-
-	b.ResetTimer()
-
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			_, err := client.Pipelined(func(pipe *redis.Pipeline) error {
-				pipe.Set("key", "hello", 0)
-				pipe.Expire("key", time.Second)
-				return nil
-			})
-			if err != nil {
-				b.Fatal(err)
-			}
-		}
-	})
-}
-
-func BenchmarkZAdd(b *testing.B) {
-	client := benchRedisClient()
-	defer client.Close()
-
-	b.ResetTimer()
-
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if err := client.ZAdd("key", redis.Z{float64(1), "hello"}).Err(); err != nil {
-				b.Fatal(err)
-			}
-		}
-	})
-}