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
What's the fastest way to tell if something is a number?
var Underscore = {};
var BELT = {},
num = 500,
pnum = "500";
BELT.isNumber = function(it) {
return typeof it === 'number';
};
Underscore.isNumber = function(it) {
return toString.call(it) == '[object ' + name + ']';
}
Ready to run.
Test | Ops/sec | |
---|---|---|
BELT typeof |
| ready |
Underscore |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.