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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https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

negation vs length equals zero

Benchmark created by Ralph Holzmann on August 4, 2010

Preparation HTML

<script>
  var arr = [];
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
Negation	`if (!arr.length) {}`	ready
Length Equals Zero	`if (arr.length == 0) {}`	ready
Length Equals Zero (Strict)	`if (arr.length === 0) {}`	ready

Revisions

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

Revision 1: published by Ralph Holzmann on August 4, 2010