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: 8 months ago

Test name	Executions per second
Map.get	6970450.5 Ops/sec
WeakMap.get	5517820.0 Ops/sec
array[0]	7450237.0 Ops/sec
object.a	7488611.0 Ops/sec
object[symbol]	5643614.5 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]

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

Map.get

WeakMap.get

array[0]

object.a

object[symbol]