Info

See http://stackoverflow.com/questions/10474992/split-a-javascript-string-into-fixed-length-pieces

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var a = "1234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412"
    
    function A(a) {
      var b = [];
      for (var i = 4; i < a.length; i += 4) { // length 4, for example
        b.push(a.slice(i - 4, i));
      }
      b.push(a.slice(a.length - (4 - a.length % 4))); // last fragment
      return b;
    }
    
    function match(a) {
      return a.match(/[\s\S]{1,4}/g);
    }
    
    function C(a) {
      var size = 4
      return [].concat.apply([], a.split('').map(function(x, i) {
        return i % size ? [] : a.slice(i, i + size)
      }, a));
    }
  };
</script>

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

var chunks = A(a);

var chunks = match(a);

var chunks = C(a);

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published on 7th May 2012
• Revision 2: published on 16th February 2013

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