init(): cache code.length

9 years ago · 1215b36b4d
1 changed files with 3 additions and 2 deletions
--- a/lib/b64.js
+++ b/lib/b64.js
@ -10,12 +10,13 @@ var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
 function init () {
  var i
  var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+  var len = code.length

-  for (i = 0; i < code.length; i++) {
+  for (i = 0; i < len; i++) {
    lookup[i] = code[i]
  }

-  for (i = 0; i < code.length; ++i) {
+  for (i = 0; i < len; ++i) {
    revLookup[code.charCodeAt(i)] = i
  }
  revLookup['-'.charCodeAt(0)] = 62