getElementsByTagname("a")[0] vs. querySelector("a") (v7)

Revision 7 of this benchmark created by Jorge Chamorro on

Description

Tests how quickly you can iterate through multiple elements on the page using getElementsByTagName("a") vs. querySelectorAll("a").

Preparation HTML

<ul>
  <li><a href="#">Item</a></li>
  <li><a href="#">Item</a></li>
  <li><a href="#">Item</a></li>
  <li><a href="#">Item</a></li>
  <li><a href="#">Item</a></li>
</ul>

Test runner

Ready to run.

Testing in
TestOps/sec
Using getElementsByTagName()
var list = document.getElementsByTagName("a");
var i = list.length;
var results = [];

while (i--) {
 results.push(list[i]);
}
ready
Using querySelectorAll()
var list = document.querySelectorAll("a");
var i = list.length;
var results = [];

while (i--) {
 results.push(list[i]);
}
ready

Revisions

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