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A simple performance test to see how object keys compares against finding any object in an array using array.indexOf versus object[key]
var _nextObjectID = 0;
function MyObject() {
this.ID = _nextObjectID + '';
_nextObjectID++;
}
var _array = [];
var _hash = {};
var _arraySmall = [];
var _hashSmall = {};
var obj = null;
for (var i = 0; i < 10000; i++) {
obj = new MyObject();
_array.push(obj);
_hash[obj.ID] = obj;
if (i < 10) {
_arraySmall.push(obj);
_hashSmall[obj.ID] = obj;
}
}
//Randomly select the object we will be looking for
var _objID = Math.round(Math.random() * _nextObjectID);
var _findObject = _array[_objID];
var _objIDSmall = Math.round(Math.random() * 9);
var _findObjectSmall = _arraySmall[_objIDSmall];
Ready to run.
Test | Ops/sec | |
---|---|---|
array.indexOf(obj) |
| ready |
object[id] |
| ready |
small array indexOf |
| ready |
small hash |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.