diff --git a/encode.go b/encode.go
index cfc28662..cd3e11aa 100644
--- a/encode.go
+++ b/encode.go
@@ -58,7 +58,7 @@ func (e *Encoder) Clean() {
 // it reuse allocated buffer and reduce memory-allocation.
 func (e *Encoder) ReuseBufferClean() {
 	var buffer []byte
-	if cap(e.buffer) <= 128 {
+	if cap(e.buffer) <= 512 {
 		// reuse buffer, avoid allocate
 		buffer = e.buffer[:0]
 	} else {