htmlEncodeStringReplacement

JavaScript performance comparison

Revision 26 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;"
  };
  function replaceEntity(chr) {
    return map[chr];
  }
  var tempElement = $(document.createElement("div"));
  String.prototype.replaceAll = function(str1, str2, ignore) 
  {
  	return this.replace(new RegExp(str1.replace(/([\/\,\!\\\^\$\{\}\[\]\(\)\.\*\+\?\|\<\>\-\&])/g,"\\$&"),(ignore?"gi":"g")),(typeof(str2)=="string")?str2.replace(/\$/g,"$$$$"):str2);
  };
  String.prototype.htmlEncode=function() {
    return this.replace(/&/g, '&amp;').replace(/"/g, '&quot;').replace(/'/g, '&#39;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
  };
  var re_amp = /&/g;
  var re_squo = /'/g;
  var re_dquo = /"/g;
  var re_lt = /</g;
  var re_gt = />/g;

};
</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…
predefined regexp literals
return html.replace(re_amp, '&amp;').replace(re_dquo, '&quot;').replace(re_squo, '&#39;').replace(re_lt, '&lt;').replace(re_gt, '&gt;');
pending…
.innerHTML
return document.createElement( 'div' ).appendChild( document.createTextNode( html ) ).parentNode.innerHTML;
pending…
string replaceAll method
return html.replaceAll('&', '&amp;').replaceAll('"', '&quot;').replaceAll("'", '&#39;').replaceAll('<', '&lt;').replaceAll('>', '&gt;');
pending…
replace chain on prototype
return html.htmlEncode();
pending…
single replace with pre-defined function
return html.replace(/[&"'\<\>]/g, replaceEntity);
pending…
chained replace, new RegExp
return html.replace(new RegExp('&', 'g'), '&amp;').replace(new RegExp('"', 'g'), '&quot;').replace(new RegExp("'", 'g'), '&#39;').replace(new RegExp('<', 'g'), '&lt;').replace(new RegExp('>', 'g'), '&gt;');
pending…

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