update bytes/string convert

pkg/convert/string.go

@@ -0,0 +1,38 @@
+// Licensed to Apache Software Foundation (ASF) under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Apache Software Foundation (ASF) licenses this file to you 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 convert
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+// StringToBytes converts string to bytes.
+func StringToBytes(s string) (b []byte) {
+	bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
+	bh.Data = sh.Data
+	bh.Cap = sh.Len
+	bh.Len = sh.Len
+	return b
+}
+
+// BytesToString converts bytes to string.
+func BytesToString(b []byte) string {
+	return *(*string)(unsafe.Pointer(&b))
+}

pkg/wal/wal.go

@@ -36,6 +36,7 @@ import (
 	"github.com/pkg/errors"
 	"go.uber.org/multierr"
 
+	"github.com/apache/skywalking-banyandb/pkg/convert"
 	"github.com/apache/skywalking-banyandb/pkg/encoding"
 	"github.com/apache/skywalking-banyandb/pkg/logger"
 	"github.com/apache/skywalking-banyandb/pkg/run"
@@ -175,15 +176,15 @@ type logSeriesID struct {
 }
 
 func newLogSeriesID(b []byte) logSeriesID {
-	return logSeriesID{key: string(b), byteLen: len(b)}
+	return logSeriesID{key: convert.BytesToString(b), byteLen: len(b)}
 }
 
 func (s logSeriesID) string() string {
 	return s.key
 }
 
 func (s logSeriesID) bytes() []byte {
-	return []byte(s.key)
+	return convert.StringToBytes(s.key)
 }
 
 func (s logSeriesID) len() int {