From fe1abc529381e730e1a6beab2c68d6d51d3b31f4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rex=20Lee=28=E6=9D=8E=E4=BF=8A=29?= <duguying2008@gmail.com>
Date: Mon, 2 Jul 2018 19:23:58 +0800
Subject: [PATCH] use buffer instead of concatenate

---
 render/json.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/render/json.go b/render/json.go
index ceb0894f..6e5089a0 100755
--- a/render/json.go
+++ b/render/json.go
@@ -126,7 +126,7 @@ func (r AsciiJSON) Render(w http.ResponseWriter) (err error) {
 		return err
 	}
 
-	result := ""
+	var buffer bytes.Buffer
 	for _, r := range string(ret) {
 		cvt := ""
 		if r < 128 {
@@ -134,10 +134,10 @@ func (r AsciiJSON) Render(w http.ResponseWriter) (err error) {
 		} else {
 			cvt = fmt.Sprintf("\\u%04x", int64(r))
 		}
-		result = result + cvt
+		buffer.WriteString(cvt)
 	}
 
-	w.Write([]byte(result))
+	w.Write(buffer.Bytes())
 	return nil
 }