新增big pool， 后续版本优化下

bytespool/bytes_big_buf.go

@@ -0,0 +1,39 @@
+// Copyright 2023-2024 antlabs. All rights reserved.
+//
+// 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 bytespool
+
+import "sync"
+
+// TODO: 启用, 目前暂未使用
+var bigPool = sync.Pool{
+	New: func() interface{} {
+		buf := make([]byte, 0, 1024*256)
+		return &buf
+	},
+}
+
+func getBigPayload(n int) (rv *[]byte) {
+	rv = bigPool.Get().(*[]byte)
+	if cap(*rv) < n {
+		tmp := make([]byte, n)
+		*rv = tmp
+	} else {
+		*rv = (*rv)[:n]
+	}
+	return rv
+}
+
+func putBigPayload(buf *[]byte) {
+	bigPool.Put(buf)
+}