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 native Map implementation vs an object without hasOwnProperty as a hash map.
var map = new Map();
var obj1 = Object.create(null);
var obj2 = {};
for (var i = 0; i < 1000; i++) {
var key = '' + Math.random(), val = '' + Math.random();
map.set(key, val);
obj1[key] = val;
obj2[key] = val;
}
Ready to run.
Test | Ops/sec | |
---|---|---|
Iterate null-prototype Object (for in) |
| ready |
Iterate Object (for in) |
| ready |
Iterate Map (for of keys) |
| ready |
Iterate Map (for of values) |
| ready |
Iterate Map (forEach) |
| ready |
Iterate Map (for...of) |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.