内容压缩算法使用Pool管理

internal/compressions/writer.go

@@ -2,9 +2,16 @@
 
 package compressions
 
+import "io"
+
 type Writer interface {
 	Write(p []byte) (int, error)
 	Flush() error
+	Reset(writer io.Writer)
+	RawClose() error
 	Close() error
 	Level() int
+
+	SetPool(pool *WriterPool)
+	ResetFinish()
 }