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
Get the size of an hash.
"use strict";
var keys = Object.keys,
getOwnPropertyNames = Object.getOwnPropertyNames;
function oldWay(obj) {
var a = [];
for (var prop in obj) {
if (obj.hasOwnProperty(prop)) {
a.push(prop);
}
}
return a;
}
function O() {
this.a = true;
this.b = true;
this.c = [1, 2, 3];
this.spoke = {
a: true
}
this.f = function() {};
}
O.prototype.abc = function() {};
var o = new O();
Ready to run.
Test | Ops/sec | |
---|---|---|
Object.getOwnPropertyNames |
| ready |
Object.keys |
| ready |
for .. in |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.