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Run results for:
Lodash keyBy vs JS Map
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=531506" 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/126.0.0.0 Safari/537.36
Browser:
Chrome 126
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Lodash keyBy (10k entries)
1323.8 Ops/sec
JS Map (10k entries)
704.3 Ops/sec
Lodash keyBy (100k entries)
71.6 Ops/sec
JS Map (100k entries)
60.5 Ops/sec
Script Preparation code:
window.data = []; for (let i = 0; i < 10000; i++) { data.push({ key: `key${i}` }); } window.dataBig = []; for (let i = 0; i < 100000; i++) { dataBig.push({ key: `key${i}` }); }
Tests:
Lodash keyBy (10k entries)
const keyed = _.keyBy(data, 'key')
JS Map (10k entries)
const map = new Map(data.map((r, i) => [data.key, i]));
Lodash keyBy (100k entries)
const keyed = _.keyBy(dataBig, 'key')
JS Map (100k entries)
const map = new Map(dataBig.map((r, i) => [dataBig.key, i]));