Array Performance

JavaScript performance comparison

Revision 210 of this test case created by

Preparation code

<script>
  Benchmark.prototype.setup = function() {
    var a1 = [{29938: {32994: 'name2'}}, {32994: {32994: 'name1'}}];

    var a2 = [];
    a2[29938] = {29938: 'name1'};
    a2[32994] = {32994: 'name2'};

    var o = {};
    o['29938'] = {29938: 'name1'};
    o['32994'] = {32994: 'name2'};
  };
</script>
    

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Manual Array Lookup
var id = 29938;
for (var i = 0; i < a1.length; i++) {
  if (i = id) result = a1[i];
}
pending…
Holey Array by Index
var id = 29938;
var result = a2[id];
pending…
Object by Key
var id = '29938';
var result = o[id];
pending…
Manual Array Lookup 2
var id = 29938;
for(var p in o) {
  if (p= id) result = o[p];
}
pending…
3
var id = 29938;
a1.forEach(function (item, i) {
            if (i= id) result = item;
        });
pending…

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