perf: hoist regular expression

Author: dougwilson

HISTORY.md

@@ -1,3 +1,8 @@
+unreleased
+==========
+
+  * perf: hoist regular expression
+
 1.0.1 / 2015-05-04
 ==================
 

index.js

@@ -12,6 +12,12 @@
 
 module.exports = auth
 
+/**
+ * RegExp for basic auth user/pass
+ */
+
+var userPassRegExp = /^([^:]*):(.*)$/
+
 /**
  * Parse the Authorization header field of a request.
  *
@@ -34,7 +40,7 @@ function auth(req) {
 
   // credentials
   auth = new Buffer(auth, 'base64').toString();
-  auth = auth.match(/^([^:]*):(.*)$/);
+  auth = auth.match(userPassRegExp)
   if (!auth) return;
 
   return { name: auth[1], pass: auth[2] };