Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 Edg/124.0.0.0
Chrome 124
Mac OS X 10.15.7
Desktop
8 months ago
Test name Executions per second
Map.get 28912326.0 Ops/sec
WeakMap.get 26544018.0 Ops/sec
array[0] 28397164.0 Ops/sec
object.a 28786108.0 Ops/sec
object[symbol] 15630047.0 Ops/sec
object[“0”] 28769420.0 Ops/sec
Script Preparation code:
AخA
 
var map = new Map();
var weakMap = new WeakMap()
var array = [];
var object = {};
var symbol = Symbol('next');
Tests:
  • Map.get

     
    map.get("0");
  • WeakMap.get

     
    weakMap.get("0")
  • array[0]

     
    array[0]
  • object.a

     
    object.a
  • object[symbol]

     
    object[symbol]
  • object[“0”]

     
    object["0"]