simple jquery selector vs 140medley

JavaScript performance comparison

Revision 3 of this test case created

Preparation code

  <ul id="list">
    <li class="first">
<div class="first">
Benchmark.prototype.setup = function() {
    <script src="//"></script>
    re = new RegExp("^(\W)?(.*)");
    $$ = function(
      a,                         // take a simple selector like "name", "#name", or ".name", and
      b                          // an optional context, and
      a = a.match(re); // split the selector into name and symbol.
      return(                    // return an element or list, from within the scope of
        b                        // the passed context
        || document              // or document,
        "getElement" + (         // obtained by the appropriate method calculated by
            ? a[1] == "#"
              ? "ById"           // the node by ID,
              : "sByClassName"   // the nodes by class name, or
            : "sByTagName"       // the nodes by tag name,
        a[2]                     // called with the name.
    $id = function(id) {
      return document.getElementById(id);
    $tag = function(tag) {
      return document.getElementsByTag(tag);
    $class = function(name) {
      return document.getElementsByClassName(name);
    function $$2(selector, context)
      var a = context || document;
      if(selector[0] == '#') return a.getElementById(selector.substring(1));
      if(selector[0] == '.') return a.getElementsByClassName(selector.substring(1));
      return a.getElementsByTagName(selector);

Preparation code output

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Testing in unknown unknown
Test Ops/sec
find by Id (medley)
var list = $$('#list')
find by Id(jquery)
var list = $('#list')
find by id (vanilla)
var list = document.getElementById('list')
find by id (wrapper)
var list = $id('list')
find by id ($$2)
var list = $$2('#list')

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