From 80719cf1819e7b786fc8752234663126d2107d95 Mon Sep 17 00:00:00 2001
From: Masaaki Goshima <goccy54@gmail.com>
Date: Thu, 3 Jun 2021 15:44:48 +0900
Subject: [PATCH] Use pre-allocated buffer for zero character

---
 decode_int.go  | 8 ++++++--
 decode_uint.go | 4 ++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/decode_int.go b/decode_int.go
index 625cc06..d351366 100644
--- a/decode_int.go
+++ b/decode_int.go
@@ -79,6 +79,10 @@ var (
 	}
 )
 
+var (
+	numZeroBuf = []byte{'0'}
+)
+
 func (d *intDecoder) decodeStreamByte(s *stream) ([]byte, error) {
 	for {
 		switch s.char() {
@@ -106,7 +110,7 @@ func (d *intDecoder) decodeStreamByte(s *stream) ([]byte, error) {
 			return num, nil
 		case '0':
 			s.cursor++
-			return []byte{'0'}, nil
+			return numZeroBuf, nil
 		case '1', '2', '3', '4', '5', '6', '7', '8', '9':
 			start := s.cursor
 			for {
@@ -150,7 +154,7 @@ func (d *intDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, error)
 			continue
 		case '0':
 			cursor++
-			return []byte{'0'}, cursor, nil
+			return numZeroBuf, cursor, nil
 		case '-', '1', '2', '3', '4', '5', '6', '7', '8', '9':
 			start := cursor
 			cursor++
diff --git a/decode_uint.go b/decode_uint.go
index 91a0004..f6c19e4 100644
--- a/decode_uint.go
+++ b/decode_uint.go
@@ -62,7 +62,7 @@ func (d *uintDecoder) decodeStreamByte(s *stream) ([]byte, error) {
 			continue
 		case '0':
 			s.cursor++
-			return []byte{'0'}, nil
+			return numZeroBuf, nil
 		case '1', '2', '3', '4', '5', '6', '7', '8', '9':
 			start := s.cursor
 			for {
@@ -104,7 +104,7 @@ func (d *uintDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, error
 			continue
 		case '0':
 			cursor++
-			return []byte{'0'}, cursor, nil
+			return numZeroBuf, cursor, nil
 		case '1', '2', '3', '4', '5', '6', '7', '8', '9':
 			start := cursor
 			cursor++