From cb08c1173fae541742af3c8329e00904edef48df Mon Sep 17 00:00:00 2001
From: unclejack <unclejacksons@gmail.com>
Date: Wed, 13 May 2015 21:48:48 +0300
Subject: [PATCH] pkg/stringid: precompile regexp

Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com>
---
 pkg/stringid/stringid.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkg/stringid/stringid.go b/pkg/stringid/stringid.go
index 3e6ff2a921..6a683b686a 100644
--- a/pkg/stringid/stringid.go
+++ b/pkg/stringid/stringid.go
@@ -10,9 +10,11 @@ import (
 
 const shortLen = 12
 
+var validShortID = regexp.MustCompile("^[a-z0-9]{12}$")
+
 // Determine if an arbitrary string *looks like* a short ID.
 func IsShortID(id string) bool {
-	return regexp.MustCompile("^[a-z0-9]{12}$").MatchString(id)
+	return validShortID.MatchString(id)
 }
 
 // TruncateID returns a shorthand version of a string identifier for convenience.