getElementById vs. querySelector (v120)

Revision 120 of this benchmark created by Rob on

Description

Compare the speed of getElementById to querySelector

Preparation HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<p id="foo">Foo</p>
<p id="bar">Bar</p>
<p id="baz">Baz</p>
<form id="f"><input id="input_1" ca-bind="input"></form>

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 form = document.getElementById("f");

Test runner

Ready to run.

Testing in
TestOps/sec
getElementById
var bar = document.getElementById("bar");
ready
querySelector
var bar = document.querySelector("#bar");
ready
mapping to getElementById
var bar = select("#bar");
ready
jQuery
var bar = $(document).find('#bar');
ready
element.querySelector
var inpt = form.querySelector("#input_1")
ready
element.querySelector custom
var inpt = form.querySelectorAll("*[ca-bind]")
ready

Revisions

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