diff --git a/server/info.go b/server/info.go
index d899d4f..1b7d27d 100644
--- a/server/info.go
+++ b/server/info.go
@@ -173,15 +173,31 @@ func (i *info) dumpStore(buf *bytes.Buffer) {
 
 	s := i.app.ldb.StoreStat()
 
+	getNum := s.GetNum.Get()
+	getTotalTime := s.GetTotalTime.Get()
+
+	gt := int64(0)
+	if getNum > 0 {
+		gt = getTotalTime.Nanoseconds() / (getNum * 1e3)
+	}
+
+	commitNum := s.BatchCommitNum.Get()
+	commitTotalTime := s.BatchCommitTotalTime.Get()
+
+	ct := int64(0)
+	if commitNum > 0 {
+		ct = commitTotalTime.Nanoseconds() / (commitNum * 1e3)
+	}
+
 	i.dumpPairs(buf, infoPair{"name", i.app.cfg.DBName},
 		infoPair{"get", s.GetNum},
 		infoPair{"get_missing", s.GetMissingNum},
-		infoPair{"put", s.PutNum},
-		infoPair{"delete", s.DeleteNum},
+		infoPair{"get_per_time", fmt.Sprintf("%0.002fms", float64(gt)/1000.0)},
 		infoPair{"iter", s.IterNum},
 		infoPair{"iter_seek", s.IterSeekNum},
 		infoPair{"iter_close", s.IterCloseNum},
 		infoPair{"batch_commit", s.BatchCommitNum},
+		infoPair{"batch_commit_per_time", fmt.Sprintf("%0.002fms", float64(ct)/1000.0)},
 	)
 }
 
diff --git a/store/db.go b/store/db.go
index 7e88342..9964c5e 100644
--- a/store/db.go
+++ b/store/db.go
@@ -39,8 +39,10 @@ func (db *DB) NewIterator() *Iterator {
 }
 
 func (db *DB) Get(key []byte) ([]byte, error) {
+	t := time.Now()
 	v, err := db.db.Get(key)
 	db.st.statGet(v, err)
+	db.st.GetTotalTime.Add(time.Now().Sub(t))
 	return v, err
 }
 
@@ -159,8 +161,10 @@ func (db *DB) needSyncCommit() bool {
 
 func (db *DB) GetSlice(key []byte) (Slice, error) {
 	if d, ok := db.db.(driver.ISliceGeter); ok {
+		t := time.Now()
 		v, err := d.GetSlice(key)
 		db.st.statGet(v, err)
+		db.st.GetTotalTime.Add(time.Now().Sub(t))
 		return v, err
 	} else {
 		v, err := db.Get(key)
diff --git a/store/stat.go b/store/stat.go
index a14a135..e0a035a 100644
--- a/store/stat.go
+++ b/store/stat.go
@@ -5,22 +5,24 @@ import (
 )
 
 type Stat struct {
-	GetNum           sync2.AtomicInt64
-	GetMissingNum    sync2.AtomicInt64
-	PutNum           sync2.AtomicInt64
-	DeleteNum        sync2.AtomicInt64
-	IterNum          sync2.AtomicInt64
-	IterSeekNum      sync2.AtomicInt64
-	IterCloseNum     sync2.AtomicInt64
-	SnapshotNum      sync2.AtomicInt64
-	SnapshotCloseNum sync2.AtomicInt64
-	BatchNum         sync2.AtomicInt64
-	BatchCommitNum   sync2.AtomicInt64
-	TxNum            sync2.AtomicInt64
-	TxCommitNum      sync2.AtomicInt64
-	TxCloseNum       sync2.AtomicInt64
-	CompactNum       sync2.AtomicInt64
-	CompactTotalTime sync2.AtomicDuration
+	GetNum               sync2.AtomicInt64
+	GetMissingNum        sync2.AtomicInt64
+	GetTotalTime         sync2.AtomicDuration
+	PutNum               sync2.AtomicInt64
+	DeleteNum            sync2.AtomicInt64
+	IterNum              sync2.AtomicInt64
+	IterSeekNum          sync2.AtomicInt64
+	IterCloseNum         sync2.AtomicInt64
+	SnapshotNum          sync2.AtomicInt64
+	SnapshotCloseNum     sync2.AtomicInt64
+	BatchNum             sync2.AtomicInt64
+	BatchCommitNum       sync2.AtomicInt64
+	BatchCommitTotalTime sync2.AtomicDuration
+	TxNum                sync2.AtomicInt64
+	TxCommitNum          sync2.AtomicInt64
+	TxCloseNum           sync2.AtomicInt64
+	CompactNum           sync2.AtomicInt64
+	CompactTotalTime     sync2.AtomicDuration
 }
 
 func (st *Stat) statGet(v interface{}, err error) {
diff --git a/store/writebatch.go b/store/writebatch.go
index bf4658c..773eeaf 100644
--- a/store/writebatch.go
+++ b/store/writebatch.go
@@ -2,38 +2,37 @@ package store
 
 import (
 	"github.com/siddontang/ledisdb/store/driver"
+	"time"
 )
 
 type WriteBatch struct {
-	wb        driver.IWriteBatch
-	st        *Stat
-	putNum    int64
-	deleteNum int64
+	wb driver.IWriteBatch
+	st *Stat
 
 	db *DB
 }
 
 func (wb *WriteBatch) Put(key []byte, value []byte) {
-	wb.putNum++
 	wb.wb.Put(key, value)
 }
 
 func (wb *WriteBatch) Delete(key []byte) {
-	wb.deleteNum++
 	wb.wb.Delete(key)
 }
 
 func (wb *WriteBatch) Commit() error {
 	wb.st.BatchCommitNum.Add(1)
-	wb.st.PutNum.Add(wb.putNum)
-	wb.st.DeleteNum.Add(wb.deleteNum)
-	wb.putNum = 0
-	wb.deleteNum = 0
+	var err error
+	t := time.Now()
 	if wb.db == nil || !wb.db.needSyncCommit() {
-		return wb.wb.Commit()
+		err = wb.wb.Commit()
 	} else {
-		return wb.wb.SyncCommit()
+		err = wb.wb.SyncCommit()
 	}
+
+	wb.st.BatchCommitTotalTime.Add(time.Now().Sub(t))
+
+	return err
 }
 
 func (wb *WriteBatch) Rollback() error {