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Run results for:
Lodash flatten vs native js
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=509079" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Safari/605.1.15
Browser:
Safari 17
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
Native(ES2019)
22.3M/s
flatMap
17.3M/s
native 1
13.2M/s
native 2
9.6M/s
_.flatten
8.4M/s
View exact numbers
Test name
Executions per second
✓
Native(ES2019)
22,295,374 Ops/sec
flatMap
17,337,858 Ops/sec
native 1
13,219,332 Ops/sec
native 2
9,631,152 Ops/sec
_.flatten
8,367,421 Ops/sec
HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Script Preparation code:
const arr = [1, [2, [3, [4]], 5]];
Tests:
native 1
[1, [2, [3, [4]], 5]].reduce( (a, b) => a.concat(b), [])
native 2
[].concat(...[1, [2, [3, [4]], 5]])
Native(ES2019)
[1, [2, [3, [4]], 5]].flat()
flatMap
[1, [2, [3, [4]], 5]].flatMap(number => number)
_.flatten
_.flatten([1, [2, [3, [4]], 5]])