Run results for: Unnecessary non-capturing groups

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/113.0

Browser: Firefox 113

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
unneededNonCaptureRE	4288846.5 Ops/sec
noNonCaptureRE	4287936.0 Ops/sec
anotherUnneededNonCapture	5368798.5 Ops/sec
anotherNoNonCapture	7372564.5 Ops/sec
indexOf	914122432.0 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."

Tests:

unneededNonCaptureRE
/(?:z)+/.exec(loremString)
noNonCaptureRE
/z+/.exec(loremString)
anotherUnneededNonCapture
/lab(?:o)rum/.exec(loremString)
anotherNoNonCapture
/laborum/.exec(loremString)
indexOf
loremString.indexOf('laborum')

Run results for: Unnecessary non-capturing groups

https://stackoverflow.com/questions/45291700/javascript-regex-non-capture-faster-than-no-parenthesis-at-all

unneededNonCaptureRE

noNonCaptureRE

anotherUnneededNonCapture

anotherNoNonCapture

indexOf