Run results for: Large Map vs Object 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36

Browser: Chrome 88

Operating system: Mac OS X 11.2.1

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Map lookup	1580.5 Ops/sec
Object lookup	1049.3 Ops/sec

Script Preparation code:

var map = new Map();
var obj = {};
for (let i = 0; i < 100000; i++) {
  const key = Math.random().toString(36).slice(2);
  const value = Math.random().toString(36).slice(2);
  map.set(key, value);
  obj[key] = value;
}
const count = 1000;

AخA
 
var map = new Map();var obj = {};for (let i = 0; i < 100000; i++) {  const key = Math.random().toString(36).slice(2);  const value = Math.random().toString(36).slice(2);  map.set(key, value);  obj[key] = value;}const count = 1000;

Tests:

Map lookup

for (let i = 0; i < 1000; i++) {
  const key = Math.random().toString(36).slice(2);
  a = map.get(key);
}

 
for (let i = 0; i < 1000; i++) {  const key = Math.random().toString(36).slice(2);  a = map.get(key);}

Object lookup

for (let i = 0; i < 1000; i++) {
  const key = Math.random().toString(36).slice(2);
  a = obj[key];
}

 
for (let i = 0; i < 1000; i++) {  const key = Math.random().toString(36).slice(2);  a = obj[key];}