htmlEncodeStringReplacement

JavaScript performance comparison

Revision 46 of this test case created

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;"
    };
    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 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…
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…
Lalallala
for (var ent in map) {
            if (!map.hasOwnProperty(ent)) continue;
            html = html.replace(new RegExp(ent, 'g'), map[ent]);
        }
return html;
pending…

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