htmlEncodeStringReplacement

JavaScript performance comparison

Revision 38 of this test case created

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Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
specialString = "\\$&";
</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, specialString), (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;  
   
    var DOMtext = document.createTextNode("test");
    var DOMnative = document.createElement("span");
    DOMnative.appendChild(DOMtext);
    var RE_amp = new RegExp("&", "g");
    var RE_squo = new RegExp("'", "g");
    var RE_dquo = new RegExp("\"", "g");
    var RE_lt = new RegExp("<", "g");
    var RE_gt = new RegExp(">", "g");
    String.prototype.htmlSafe = function() {
      return this
        .replace(RE_amp, '&amp;')
        .replace(RE_dquo, '&quot;')
        .replace(RE_squo, '&#39;')
        .replace(RE_lt, '&lt;')
        .replace(RE_gt, '&gt;');
    };
    String.prototype.replaceAll2 = function(s1, s2) {
      return this.split(s1).join(s2);
    };
   
    var expected = html.replace(/&/g, '&amp;').replace(/"/g, '&quot;').replace(/'/g, '&#39;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
    DOMtext.nodeValue = html;
    var expectedHTML = DOMnative.innerHTML;
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
multiple replace()
return html.replace(/&/g, '&amp;', "g").replace(/"/g, '&quot;', "g").replace(/'/g, '&#39;', "g").replace(/</g, '&lt;', "g").replace(/>/g, '&gt;', "g");
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…
.nodeValue
DOMtext.nodeValue = html;
return DOMnative.innerHTML;
pending…
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…
replace new RegExp literal
return html
  .replace(RE_amp, '&amp;')
  .replace(RE_dquo, '&quot;')
  .replace(RE_squo, '&#39;')
  .replace(RE_lt, '&lt;')
  .replace(RE_gt, '&gt;');
pending…
replace new RegExp literal prototype
return html.htmlSafe();
pending…
split join replace (prototype)
return html.replaceAll2('&', '&amp;').replaceAll2('"', '&quot;').replaceAll2("'", '&#39;').replaceAll2('<', '&lt;').replaceAll2('>', '&gt;');
pending…
split join inline
return html.split('&').join('&amp;').split('"').join('&quot;').split("'").join('&#39;').split('<').join('&lt;').split('>').join('&gt;');
pending…
multiple replace strings
return html.replace('&', '&amp;', "g").replace('"', '&quot;', "g").replace("'", '&#39;', "g").replace('<', '&lt;', "g").replace('>', '&gt;', "g");
pending…

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