Run results for: Extension stripping

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: 3 months ago

Test name	Executions per second
RegExp string replace	3508142.8 Ops/sec
lastIndexOf and string.slice	7485712.5 Ops/sec
lastIndexOf and string.substring	7546730.0 Ops/sec
lastIndexOf and regexp test on rest	3199474.8 Ops/sec

Tests:

RegExp string replace
const stripExtension = (path) => path.replace(/\.\w+$/, ''); stripExtension('short') stripExtension('with.ext') stripExtension('longer/path/with-segments/and/an-extension.png')
lastIndexOf and string.slice
const stripExtension = (path) => { const periodIndex = path.lastIndexOf('.'); return periodIndex < path.length - 1 ? path.slice(0, periodIndex) : path; } stripExtension('short') stripExtension('with.ext') stripExtension('longer/path/with-segments/and/an-extension.png')
lastIndexOf and string.substring
const stripExtension = (path) => { const periodIndex = path.lastIndexOf('.'); return periodIndex < path.length - 1 ? path.substring(0, periodIndex) : path; } stripExtension('short') stripExtension('with.ext') stripExtension('longer/path/with-segments/and/an-extension.png')
lastIndexOf and regexp test on rest
const extRE = /^\.\w+$/; const stripExtension = (path) => { const periodIndex = path.lastIndexOf('.'); const rest = path.slice(periodIndex); return rest && extRE.test(rest) ? path.slice(0, periodIndex) : path; } stripExtension('short') stripExtension('with.ext') stripExtension('longer/path/with-segments/and/an-extension.png')