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Run results for:
Object iteration benchmark
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0
Browser:
Firefox 140
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
10 months ago
Test name
Executions per second
for with Object.keys()
623436.8 Ops/sec
for of Object.keys()
533461.9 Ops/sec
for in with Object.hasOwn()
321122.9 Ops/sec
for in
398866.6 Ops/sec
Script Preparation code:
const o = {}; for (let i = 0; i < 36; i++) { o[i.toString(36)] = 0; }
Tests:
for with Object.keys()
const ks = Object.keys(o); for (let i = 0, l = ks.length; i < l; i++) { o[ks[i]]++; }
for of Object.keys()
for (const k of Object.keys(o)) { o[k]++; }
for in with Object.hasOwn()
for (const k in o) { if (Object.hasOwn(o, k)) { o[k]++; } }
for in
for (const k in o) { o[k]++; }