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Run results for:
Unnecessary non-capturing groups
https://stackoverflow.com/questions/45291700/javascript-regex-non-capture-faster-than-no-parenthesis-at-all
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=607792" 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/136.0.0.0 Safari/537.36
Browser:
Chrome 136
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
11 months ago
Test name
Executions per second
unneededNonCaptureRE
7059473.0 Ops/sec
noNonCaptureRE
7018906.0 Ops/sec
anotherUnneededNonCapture
12675217.0 Ops/sec
anotherNoNonCapture
5793599.5 Ops/sec
indexOf
215629744.0 Ops/sec
Script Preparation code:
var loremString = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum." var unneededNonCaptureRE = /(?:z)+/ var noNonCaptureRE = /z+/ var anotherUnneededNonCapture = /lab(?:o)rum/ var anotherNoNonCapture = /laborum/
Tests:
unneededNonCaptureRE
unneededNonCaptureRE.exec(loremString)
noNonCaptureRE
noNonCaptureRE.exec(loremString)
anotherUnneededNonCapture
anotherUnneededNonCapture.exec(loremString)
anotherNoNonCapture
anotherNoNonCapture.exec(loremString)
indexOf
loremString.indexOf('laborum')