Array Performance

JavaScript performance comparison

Revision 186 of this test case created by Tom

Preparation code

<script>
  Benchmark.prototype.setup = function() {

var objs = [];
for (var i = 1; i <= 10000; i++) {
  objs.push({id: i, name: 'name' + i});
}

var a1 = objs;

    var a2 = [];
for (var i = 1; i <= 10000; i++) {
  a2[i] = {id: i, name: 'name' + i};
}

    var o = {};
for (var i = 1; i <= 10000; i++) {
  o.i = {id: i, name: 'name' + i};
}
  };
</script>
    

Test runner

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Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Manual Array Lookup
var id = 9999;
for (var i = 0; i < a1.length; i++) {
  if (a1[i].id == id) result = a1[i];
}
pending…
Holey Array by Index
var id = 9999;
var result = a2[id];
pending…
Object by Key
var id = '9999';
var result = o[id];
pending…

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Revisions

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