getElementById vs. querySelector (v136)

Revision 136 of this benchmark created on

Preparation HTML

<p id="foo">Foo</p>
<p id="bar" class="nn">Bar</p>
<p id="baz">Baz</p>

Setup

var idSelectorRegexp = /^#[a-zA-Z]+[a-zA-Z0-9_\-]*$/;
  
  var select = function(query){
    // pure ID selector?
    if (idSelectorRegexp.test(query))
      return document.getElementById(query.slice(1));
    else
      return document.querySelector(query);
  };
  
  var $ = {};
  $.class = function(cls, context) {
    return (context || document).getElementsByClassName(cls);
  }

Test runner

Ready to run.

Testing in
TestOps/sec
querySelector
var bar = document.querySelector(".nn");
ready
getElementsByClassName
var bar = document.getElementsByClassName("nn");
ready
mapping to getElementById
var bar = select("#bar");
ready
$.class
var bar = $.class('nn');
ready

Revisions

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