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
Compare using primitive string type vs string object. Based on http://dev.opera.com/articles/view/efficient-javascript/
var primitiveStr = 'some string...';
var objectStr = new String('some string...');
Ready to run.
Test | Ops/sec | |
---|---|---|
Primitive type |
| ready |
String object |
| ready |
Primitive type - index access |
| ready |
String object - index access |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.