Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Chrome 120
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
WeakMap set 16791.4 Ops/sec
Symbol Property set 18412.7 Ops/sec
WeakMap get 16242.6 Ops/sec
Symbol Property get 18481.1 Ops/sec
Script Preparation code:
AخA
 
var to0 = {};
var to1 = {};
var wm = new WeakMap();
var sy = Symbol();
wm.set(to1, 1);
to1[sy] = 1;
Tests:
  • WeakMap set

     
    for(let i=900;--i;) wm.set(to0, 1);
  • Symbol Property set

     
    for(let i=900;--i;) to0[sy] = 1;
  • WeakMap get

     
    for(let i=900;--i;) {let r = wm.get(to1);}
  • Symbol Property get

     
    for(let i=900;--i;) {let r = to1[sy];}