Run results for: Map vs Object.create(null)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Map lookup	132191.3 Ops/sec
Obj lookup	235381.1 Ops/sec

Script Preparation code:

var map = new Map();
var obj = Object.create(null);

for (let i = 0; i < 20; ++i) {
  map.set(i, i)
  obj[i] = i
}

var i = 0, count = 1000, a;

Tests:

Map lookup
for (i = 0; i < count; i++) { a = map.get(i % 20); }
Obj lookup
for (i = 0; i < count; i++) { a = obj[i % 20]; }

Run results for: Map vs Object.create(null)

Lookup of map vs object

Map lookup

Obj lookup