Run results for: My Map vs Object Insert

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; Pixel 4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.164 Mobile Safari/537.36

Browser: Chrome Mobile 91

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
Map Get	75.7 Ops/sec
Object Get	77.4 Ops/sec

Script Preparation code:


var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';

var map = new Map();
var obj = {};

var i = 0, j = 0, count = 10000, ch, a;

for (j = 0; j < 10; j++) { 
  map.set(characters[j], "qwertyuiop");
}

for (j = 0; j < 10; j++) {
  obj[characters[j]] = "qwertyuiop";
}

Tests:

Map Get
for (i = 0; i < count; i++) { ch = Math.floor(Math.random() * 10) a = map.get(ch); }
Object Get
for (i = 0; i < count; i++) { ch = Math.floor(Math.random() * 10) a = obj[ch]; }

Run results for: My Map vs Object Insert

Map Get

Object Get