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Run results for:
forEach mutate object vs map spread copy v2
add field into object with forEach vs spread fields into new object with new field in array of objects
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<iframe src="https://measurethat.net/Embed?id=524784" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Browser:
Chrome 124
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
forEach
1.5M/s
map
1.3M/s
View exact numbers
Test name
Executions per second
✓
forEach
1,493,999 Ops/sec
map
1,276,852 Ops/sec
Tests:
map
const objects = [ { a: 'XzWtv', b: 'sFqrG', c: 'qCbnP' }, { a: 'yjkAu', b: 'vMhlE', c: 'xPqro' }, { a: 'wNztX', b: 'gDypR', c: 'iHklL' }, { a: 'mQjvs', b: 'dKzpt', c: 'aVbcO' }, { a: 'bUefZ', b: 'cRiyG', c: 'uTqxs' } ] objects.map(el => ({...el, d: Math.random()}))
forEach
const objects = [ { a: 'XzWtv', b: 'sFqrG', c: 'qCbnP' }, { a: 'yjkAu', b: 'vMhlE', c: 'xPqro' }, { a: 'wNztX', b: 'gDypR', c: 'iHklL' }, { a: 'mQjvs', b: 'dKzpt', c: 'aVbcO' }, { a: 'bUefZ', b: 'cRiyG', c: 'uTqxs' } ] objects.forEach(el => {el.d = Math.random()})