MeasureThat.net

Run results for: WeakMap vs Symbol 3

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36 Edg/129.0.0.0
Chrome 129
Mac OS X 10.15.7
Desktop
6 months ago
Test name Executions per second
WeakMap set 14126756.0 Ops/sec
Symbol Property set 14978403.0 Ops/sec
WeakMap get 7216884.5 Ops/sec
Symbol Property get 7425304.5 Ops/sec
Symbol Property get (from own descriptor) 4879848.0 Ops/sec
Symbol Property get (if hasOwn) 3861038.2 Ops/sec
Script Preparation code:
AخA
 
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(to1, sy) ? to1[sy] : undefined;