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.
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https://jsperf.com/negative-modulo/2
Can be accessed at:
https://jsperf.app/negative-modulo/2
A small change compared to edit 31 where your treating an object as a hash table/map (deleting/adding keys). For-in becomes incredibly slow on V8 (node, chrome, opera).
var i;
var key;
var keys;
var l;
var value;
var hasOwnProperty = {}.hasOwnProperty;
var obj = {
'a': 1,
'b': 2,
'c': 3,
'd': 4,
'e': 5,
'f': 6,
'g': 7,
'h': 8,
'i': 9,
'j': 10
};
delete obj['h'];
obj['k'] = 11;
Ready to run.
Test | Ops/sec | |
---|---|---|
hasOwnProperty |
| ready |
Object.keys |
| ready |
Object.keys with forEach |
| ready |
Plain for...in |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.