Run results for: Array vs Object vs Map vs WeakMap access (123123)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

object.a

7.5M/s

array[0]

7.5M/s

Map.get

7.0M/s

object[symbol]

5.6M/s

WeakMap.get

5.5M/s

View exact numbers

Test name	Executions per second
✓ object.a	7,488,611 Ops/sec
array[0]	7,450,237 Ops/sec
Map.get	6,970,450 Ops/sec
object[symbol]	5,643,614 Ops/sec
WeakMap.get	5,517,820 Ops/sec

Script Preparation code:

var map = new Map([["0",1]]);

var array = [1];

var symbol = Symbol('next');
var object = {["0"]: 1, [symbol]: 1 };
var weakMap = new WeakMap([[object,1]])
var x = 0;

Tests:

Map.get
x += map.get("0");
WeakMap.get
x += weakMap.get(object)
array[0]
x += array[0]
object.a
x += object.a
object[symbol]
x += object[symbol]