ES6 Map vs Object properties

JavaScript performance comparison

Revision 48 of this test case created by

Preparation code 


      
      <script>

        Benchmark.prototype.setup = function() {

          
  var map = new Map(),
      obj1 = Object.create(null),
      obj2 = {};
  
  for (var i=0; i < 1000; i++) {
     var key = Math.random(), val = Math.random();
     
     map.set(key,val);
     obj1[key] = val;
     obj2[key] = val;
  }

        
  };


      
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
map.set(key,val) 
for ( key in obj1 ) {
    obj1[key];
}
 pending…
obj[key] = val; 
for ( key in obj2 ) {
    obj2[key];
}
 pending…
Iterate Map (for of) 
val = map.keys();

for ( key in val ) {
    map[key];
}
 pending…
Iterate Map (for) 
val = map.values();

for ( key in val ) {
    key;
}
 pending…
Iterate Object 
i = map.entries();

for ( var [key,val] of i ) {
    val;
}
 pending…

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