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Run results for:
concat() vs spread operator
Performance comparison of two methods of combining arrays shown here: https://twitter.com/SimonHoiberg/status/1287797397137965057
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<iframe src="https://measurethat.net/Embed?id=554850" 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/127.0.0.0 Safari/537.36
Browser:
Chrome 127
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
concat
1722031.5 Ops/sec
spread operator
289053.4 Ops/sec
Script Preparation code:
foo = Array.from(Array(1000).keys()) bar = Array.from(Array(1000).keys())
Tests:
concat
const result = foo.concat(bar)
spread operator
const result = [ ...foo, ...bar ]