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.

jsperf.com URLs are mirrored at the same path, e.g:

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

Can be accessed at:

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

string to int

Benchmark created by rmaksim on October 7, 2011

Preparation HTML

<script>
  var s = "12", i;
  
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
parseint	`i = parseInt(s);`	ready
plus	`i = +s;`	ready
number	`i = Number(s);`	ready
tilda	`i = ~~s;`	ready
parseint2	`i = parseInt(s);`	ready
plus2	`i = +s;`	ready
number2	`i = Number(s);`	ready
tilda2	`i = ~~s;`	ready
or	`i = s\|0;`	ready
up	`i = s^0;`	ready
shift	`i = s>>0;`	ready
or2	`i = s\|0;`	ready
up2	`i = s^0;`	ready
shift2	`i = s>>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 rmaksim on October 7, 2011
Revision 2: published on October 7, 2011