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

test1

Benchmark created by yelin on October 13, 2014

Test runner

Ready to run.

Test Ops/sec

substring

Testing in
Test	Ops/sec
substring	`var s = 'abcdefghijklmnopqrstuvwxyz'; var str = s.substring(0, 8) + '-' + s.substring(8, 12) + '-' + s.substring(12, 16) + '-' + s.substr(16);`	ready
regex	`var s = 'abcdefghijklmnopqrstuvwxyz'; var str = s.replace(/^(\w{8})(\w{4})(\w{4})(\w+)$/g, '$1-$2-$3-$4');`	ready

var s = 'abcdefghijklmnopqrstuvwxyz';
var str = s.substring(0, 8) + '-' + s.substring(8, 12) + '-' + s.substring(12, 16) + '-' + s.substr(16);

ready

regex

var s = 'abcdefghijklmnopqrstuvwxyz';
var str = s.replace(/^(\w{8})(\w{4})(\w{4})(\w+)$/g, '$1-$2-$3-$4');

ready

Revisions

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

Revision 1: published by yelin on October 13, 2014