Run results for: .startsWith() vs .test() vs .match() vs .indexOf() vs .substr() - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Android 14; Mobile; rv:143.0) Gecko/143.0 Firefox/143.0

Browser: Firefox Mobile 143

Operating system: Android

Device Platform: Mobile

Date tested: 6 months ago

Test name	Executions per second
regexp .test()	14856788.0 Ops/sec
string .match()	8702320.0 Ops/sec
indexOf === 0	977278144.0 Ops/sec
string .startsWith()	894059392.0 Ops/sec
Equality	963036928.0 Ops/sec

Script Preparation code:

var html = "https://www.google.com";

Tests:

regexp .test()
/^https?:\/\//.test(html)
string .match()
!!html.match(/^https:\/\//)
indexOf === 0
html.indexOf('https://') === 0
string .startsWith()
html.startsWith('https://')
Equality
html.substr(0,'https://'.length) === 'https://'