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/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

array[0]

18.6M/s

object.a

18.4M/s

Map.get

17.8M/s

WeakMap.get

17.5M/s

object[symbol]

17.3M/s

View exact numbers

Test name	Executions per second
✓ array[0]	18,560,010 Ops/sec
object.a	18,386,114 Ops/sec
Map.get	17,832,704 Ops/sec
WeakMap.get	17,493,770 Ops/sec
object[symbol]	17,309,896 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]