Run results for: WeakMap vs Symbol Property

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; SAMSUNG SM-S906N) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/19.0 Chrome/102.0.5005.125 Mobile Safari/537.36

Browser: Chrome Mobile 102

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
WeakMap set	5840186.5 Ops/sec
Symbol Property set	6315209.0 Ops/sec
WeakMap get	6062295.5 Ops/sec
Symbol Property get	6359121.5 Ops/sec

Script Preparation code:

var to0 = {};
var to1 = {};
var wm = new WeakMap();
var sy = Symbol();
wm.set(to1, 1);
to1[sy] = 1;

Tests:

WeakMap set
wm.set(to0, 1);
Symbol Property set
to0[sy] = 1;
WeakMap get
let r = wm.get(to1);
Symbol Property get
let r = to1[sy];

Run results for: WeakMap vs Symbol Property

WeakMap set

Symbol Property set

WeakMap get

Symbol Property get