htmlEncodeRegEx

JavaScript performance comparison

Revision 16 of this test case created by ThinkingStiff

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
 
<script>
  Benchmark.prototype.setup = function() {
    var html = document.body.innerHTML;
    var map = {
      "&": "&amp;",
      "'": "&#39;",
      '"': "&quot;",
      "<": "&lt;",
      ">": "&gt;"
    };
    var tempElement = $(document.createElement("div"));
  };
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
multiple replace()
 
return html.replace(/&/g, '&amp;').replace(/"/g, '&quot;').replace(/'/g, '&#39;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
 pending…
single replace with map
 
return html.replace(/[&"'\<\>]/g, function(c) {
  return map[c];
});
 pending…
single replace with switch
 
return html.replace(/[&"'\<\>]/g, function(c) {
  switch (c) {
  case "&":
    return "&amp;";
  case "'":
    return "&#39;";
  case '"':
    return "&quot;";
  case "<":
    return "&lt;";
  case ">":
    return "&gt;";
  }

});
 pending…
use jQuery
 
return $('<div/>').text(html).html();
 pending…
use jQuery with pre-created element
 
return tempElement.text(html).html();
 pending…
.innerHTML
 
return document.createElement( 'div' ).appendChild( document.createTextNode( html ) ).parentNode.innerHTML;
 
 pending…

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