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
http://stackoverflow.com/questions/7174748/javascript-object-detection-dot-syntax-versus-in-keyword/7174775#7174775
<script>
var object = {property: 0};
function has(obj, prop) {
return Object.prototype.hasOwnProperty.call(obj, prop);
}
function key_present(obj, prop) {
return Object.keys( obj ).indexOf( prop ) === -1 ? false : true;
}
</script>Ready to run.
| Test | Ops/sec | |
|---|---|---|
| if(object.property) | | ready |
| if('property' in object) | | ready |
| if(object.hasOwnProperty('property')) | | ready |
| if(has(object, 'property')) | | ready |
| if(key_present(object, 'property')) | | ready |
| if(object[ 'property' ]) | | ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.