Run results for: comparing Map and object

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36

Browser: Chrome 101

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
setting object	1.2 Ops/sec
setting Map	1.2 Ops/sec
getting object	1.2 Ops/sec
getting Map	1.2 Ops/sec

Script Preparation code:

var o = {}, m = new Map();
function randomInt(min, max){
  return Math.floor(Math.random() * (max - min + 1)) + min;
}
function randomString(length){
  var result = '';
  var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  var charactersLength = characters.length;
  for ( var i = 0; i < length; i++ ) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength));
  }
  return result;
}
var keys = [];
for(var i=0; i<20; i++){
  keys.push(randomString(randomInt(2, 10)));
}
var count = 1000000

Tests:

setting object
for(var i=0; i<count; i++){ let i = randomInt(0, 20); o[keys[i]] = i; }
setting Map
for(var i=0; i<count; i++){ let i = randomInt(0, 20); m.set(keys[i], i); }
getting object
for(var i=0; i<count; i++){ let i = randomInt(0, 20); o[keys[i]]; }
getting Map
for(var i=0; i<count; i++){ let i = randomInt(0, 20); m.get(keys[i]); }

Run results for: comparing Map and object

comparing Map and object setting and getting

setting object

setting Map

getting object

getting Map