Run results for: Map.get vs Object property access

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.3.2

Device Platform: Mobile

Date tested: one year ago

Map

428.6M/s

Object

396.4M/s

View exact numbers

Test name	Executions per second
✓ Map	428,601,664 Ops/sec
Object	396,410,112 Ops/sec

Script Preparation code:

obj = {foo: 'bar'}
map = new Map(Object.entries(obj))

Tests:

Map
map.get("foo")
Object
obj["foo"]