simple jquery selector vs 140medley

JavaScript performance comparison

Revision 5 of this test case created

Preparation code

<div>
  <ul id="list">
    <li class="first">
    </li>
    <li>
    </li>
  </ul>
</div>
<div class="first">
</div>
<script>
var re = new RegExp("^(\W)?(.*)");
var $$ = 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]
        ? 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);
}
$extra=  function(selector, context)
{
  var a = context || document;
  if (selector[0] == '#'){
     return a.getElementById(selector.slice(1));
  }
  else if (selector[0] == '.') {
     return a.getElementsByClassName(selector.slice(1));
  }
  return a.getElementsByTagName(selector);
}

</script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

Preparation code output

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

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