Map vs IterableMap

JavaScript performance comparison

Revision 17 of this test case created

Preparation code

<script>
function IterableMap() {
  this._internal = new Map();
  this._keys = new Array(100);
  this.size = 0;

  this.has = Map.prototype.has.bind(this._internal);
  this.set = Map.prototype.has.bind(this._internal);
  this.get = Map.prototype.has.bind(this._internal);
}
</script>
<script>
  Benchmark.prototype.setup = function() {
    var keys = [
      1,
      {},
      [],
      "1"
    ];
    
    var m1 = new Map();
    var m2 = new IterableMap();
  };
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
Map
 
for(var i = 0, il = keys.length; i < il; i++) {
   m1.set(keys[i], 1);
   m1.has(keys[i]);
   m1.get(keys[i]);
}
 pending…
IterableMap
 
for(var i = 0, il = keys.length; i < il; i++) {
   m2.set(keys[i], 1);
   m2.has(keys[i]);
   m2.get(keys[i]);
}
 pending…

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