Run results for: map get vs object get by key

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36

Browser: Chrome 147

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 4 months ago

Benchmark engine: Benchmark.js

object by key

6K/s

map get

4K/s

View exact numbers

Test name	Executions per second
✓ object by key	5,673 Ops/sec
map get	3,765 Ops/sec

Script Preparation code:

var map = new Map();
var obj = {};

var j = 0;
while (j < 10000) {
  var key = "Key_" + j;
  map.set(key, 5);
  obj[key] = 5;
  j += 1;
}

var stringKey = 'asdfasdjfa;sjfjaklfjklsjklajjjj;jlsjfajdfsfjs;fjsfka';

var i = 0, count = 1000, a;

Tests:

map get
for (i = 0; i < count; i++) { a = map.get('Key_' + i); }
object by key
for (i = 0; i < count; i++) { a = obj['Key_' + i]; }