jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

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Document.body vs document.getElementsByTagName('body')[0]

Benchmark created on October 30, 2011

Test runner

Ready to run.

Testing in
Test		Ops/sec
document.body	`var body = document.body;`	ready
document.getElementsByTagName('body')[0]	`var body2 = document.getElementsByTagName('body')[0];`	ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

Revision 1: published on October 30, 2011
Revision 2: published on October 12, 2013
Revision 3: published by Dennis on November 16, 2013
Revision 4: published on April 5, 2014
Revision 5: published by John Michel on March 12, 2015
Revision 6: published on June 8, 2015