optimize(orbyte): use manual destroy

internal/bin/pool.go

@@ -5,6 +5,8 @@ import (
 )
 
 // SelectWriter 从池中取出一个 Writer
+//
+// 不要忘记调用 Destroy 以快速回收资源
 func SelectWriter() *Writer {
 	return (*Writer)(pbuf.NewBuffer(nil))
 }

internal/bin/writer.go

@@ -11,10 +11,12 @@ import (
 // Writer 写入
 type Writer pbuf.OBuffer
 
-func NewWriterF(f func(writer *Writer)) pbuf.Bytes {
+func NewWriterF(f func(writer *Writer)) []byte {
 	w := SelectWriter()
 	f(w)
-	return w.ToBytes()
+	b := w.ToBytes().Copy()
+	w.Destroy()
+	return b.Trans()
 }
 
 func (w *Writer) P(f func(*pbuf.Buffer)) *Writer {
@@ -64,3 +66,7 @@ func (w *Writer) WriteUInt64(v uint64) {
 func (w *Writer) ToBytes() pbuf.Bytes {
 	return pbuf.BufferItemToBytes((*pbuf.OBuffer)(w))
 }
+
+func (w *Writer) Destroy() {
+	(*pbuf.OBuffer)(w).ManualDestroy()
+}