Array Performance

JavaScript performance comparison

Revision 187 of this test case created by

Preparation code

<script>
  Benchmark.prototype.setup = function() {
    var i;
    var a1 = [];
    for (i = 1; i<=10000; i++) {
        a1.push({id: i, name: 'name'});
    }

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

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

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Manual Array Lookup
var id = 10000;
for (var i = 0; i < a1.length; i++) {
  if (a1[i].id == id) result = a1[i];
}
pending…
Holey Array by Index
var id = 10000;
var result = a2[id];
pending…
Object by Key
var id = 10000;
var result = o[id];
pending…

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