diff --git a/core/stat/base/leap_array.go b/core/stat/base/leap_array.go
index 9d6a253b7..897380818 100644
--- a/core/stat/base/leap_array.go
+++ b/core/stat/base/leap_array.go
@@ -90,9 +90,7 @@ func NewAtomicBucketWrapArrayWithTime(len int, bucketLengthInMs uint32, now uint
 		startTime += uint64(bucketLengthInMs)
 	}
 
-	// calculate base address for real data array
-	sliHeader := (*util.SliceHeader)(unsafe.Pointer(&ret.data))
-	ret.base = unsafe.Pointer((**BucketWrap)(unsafe.Pointer(sliHeader.Data)))
+	ret.base = unsafe.Pointer(&ret.data[0])
 	return ret
 }
 
diff --git a/util/safe.go b/util/safe.go
deleted file mode 100644
index 3eedc6db9..000000000
--- a/util/safe.go
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright 1999-2020 Alibaba Group Holding Ltd.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package util
-
-import "unsafe"
-
-// SliceHeader is a safe version of SliceHeader used within this project.
-type SliceHeader struct {
-	Data unsafe.Pointer
-	Len  int
-	Cap  int
-}
-
-// StringHeader is a safe version of StringHeader used within this project.
-type StringHeader struct {
-	Data unsafe.Pointer
-	Len  int
-}