ES6 Map vs Object properties (v16)

Revision 16 of this benchmark created on

Description

Compare native Map implementation vs using an object as a hash map.

Setup

var map = new Map();
    var obj = {};
    
    var map2 = new Map();
    var obj2 = {};
    
    for (var i=0; i < 1000; i++) {
       var key = i.toString();
       var val = i;
       map2.set(key,val);
       obj2[key] = val;
    }
    
    map2.set('foo', 'bar');
    obj2['foo'] = 'bar';

Test runner

Ready to run.

Testing in
TestOps/sec
Set Map
for (var i=0; i < 1000; i++) {
   var key = i.toString();
   var val = i;
   map.set(key,val);
}
ready
Set Object
for (var i=0; i < 1000; i++) {
   var key = i.toString();
   var val = i;
   obj[key] = val;
}
ready
Iterate Map
for (var key of map2.keys()) {
  var val = map2.get(key);
}
ready
Iterate Object
var key;
for (key in obj2) {
  if (obj2.hasOwnProperty(key)) {
    var val = obj2[key];
  }
}
ready
Get Map
var val = map2.get('foo');

for (var i=0; i < 1000; i++) {
   var key = i.toString();
   var val = map2.get(key);
}
ready
Get Object
var val = obj2['foo'];

for (var i=0; i < 1000; i++) {
   var key = i.toString();
   var val = obj2[key];
}
ready

Revisions

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