Run results for: WeakMap vs Symbol 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Windows

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
WeakMap set	12726717.0 Ops/sec
Symbol Property set	13497805.0 Ops/sec
WeakMap get	6409639.0 Ops/sec
Symbol Property get	6529689.0 Ops/sec
Symbol Property get (from own descriptor)	4280086.0 Ops/sec
Symbol Property get (if hasOwn)	3817115.0 Ops/sec

Script Preparation code:

var to0 = {};
var to1 = {};
var wm = new WeakMap();
var sy = Symbol();
wm.set(to1, 1);
to1[sy] = 1;
window.r = 0

Tests:

WeakMap set
wm.set(to0, 1);
Symbol Property set
to0[sy] = 1;
WeakMap get
r = wm.get(to1);
Symbol Property get
r = to1[sy];
Symbol Property get (from own descriptor)
r = Object.getOwnPropertyDescriptor(to1, sy).value;
Symbol Property get (if hasOwn)
r = Object.hasOwn(sy) ? to1[sy] : undefined;