From fbf776258498dbb3aa6637ca82c7fe5c7255fd2f Mon Sep 17 00:00:00 2001
From: rickyyangz <38900912+rickyyangz@users.noreply.github.com>
Date: Thu, 10 Oct 2019 21:39:04 +0800
Subject: [PATCH] faster VarintSize() (#282)

---
 encoder.go | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/encoder.go b/encoder.go
index ba786e73..9130ddec 100644
--- a/encoder.go
+++ b/encoder.go
@@ -42,9 +42,7 @@ func EncodeVarint(w io.Writer, i int64) (err error) {
 }
 
 func VarintSize(i int64) int {
-	var buf [10]byte
-	n := binary.PutVarint(buf[:], i)
-	return n
+	return UvarintSize(uint64((uint64(i) << 1) ^ uint64(i>>63)))
 }
 
 //----------------------------------------