ES6 Map vs Object properties (v85)

Revision 85 of this benchmark created on

Description

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

Preparation HTML

<script>
function randomString()
{
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

    for( var i=0; i < 5; i++ )
        text += possible.charAt(Math.floor(Math.random() * possible.length));

    return text;
}
function rand(min, max) {
    return Math.random() * (max - min) + min;
}
</script>

Setup

var map2 = new Map();
    var obj2 = {};
    
    for (var i=0; i < 250000; i++) {
       var key = i;
       var val = randomString();
       map2.set(key,val);
       obj2[key] = val;
    }

Test runner

Ready to run.

Testing in
TestOps/sec
map.set(key,val)
for (var i=0; i < 1000; i++) {
   var key = randomString();
   var val = randomString();
   map2.set(key,val);
}
ready
obj[key] = val;
for (var i=0; i < 1000; i++) {
   var key = randomString();
   var val = randomString();
   obj2[key] = val;
}
ready
Iterate Map
for (var i=0; i < 1000; i++) {
   var a = map2.get(rand(0, 249999));
}
 
ready
Iterate Object
for (var i=0; i < 1000; i++) {
   var a = obj2[rand(0, 249999)];
}
 
ready

Revisions

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