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Run results for:
WeakMap vs Symbol Property 900
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=494568" width="100%" height="500px"></iframe>
Run details:
User agent:
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
Browser:
Chrome 120
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Symbol Property get
18K/s
Symbol Property set
18K/s
WeakMap set
17K/s
WeakMap get
16K/s
View exact numbers
Test name
Executions per second
✓
Symbol Property get
18,481 Ops/sec
Symbol Property set
18,413 Ops/sec
WeakMap set
16,791 Ops/sec
WeakMap get
16,243 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
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];}