htmlEncodeRegEx

JavaScript performance comparison

Revision 2 of this test case created by

Preparation code

<script src="https://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"));
  
  var arr = [
    [/&/g, '&amp;'],
    [/'/g, '&#39;'],
    [/"/g, '&quot;'],
    [/</g, '&lt;'],
    [/>/g, '&gt;']
  ];
  var better_map_fn = function(c) {
    return map[c];
  };
  var el_10 = document.createElement('div');

};
</script>

Preparation code output

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Testing in CCBot 2.0.0 / Other 0.0.0
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…
string replace with array map
var t, i, _html = html;
for(var t, i = 0; t = arr[i]; i++) {
  _html = _html.replace(t[0], t[1]);
}
return _html;
pending…
better map replace
return html.replace(/[&"'\<\>]/g, better_map_fn);
pending…
vanilla element method
var el = document.createElement('div');
el.appendChild(document.createTextNode(html));
return el.innerHTML;
pending…
vanilla element method, with precreated element
el_10.innerHTML = '';
el_10.appendChild(document.createTextNode(html));
return el_10.innerHTML;
pending…

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