Performance of Array vs. Object
JavaScript performance comparison
Preparation code
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
Benchmark.prototype.setup = function() {
var arr = [],
i,
obj = {};
for(i = 0; i < 10000; i += 1) {
var o = {payload:i};
arr.push(o);
obj[i] = o;
}
};
</script>
Preparation code output
Test runner
Warning! For accurate results, please disable Firebug before running the tests. (Why?)
Java applet disabled.
Test | Ops/sec | |
---|---|---|
Array Performance
|
|
pending… |
Object Performance
|
|
pending… |
Object Performance using known length
|
|
pending… |
Using Object.keys()
|
|
pending… |
Using Object.keys(), cached length, assuming object is arraylike
|
|
pending… |
Array Performance known length
|
|
pending… |
just testing len portion of test 5
|
|
pending… |
Object using jquery $.each
|
|
pending… |
Compare results of other browsers
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