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

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; CPH2005) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 109

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
regexp .test()	4586640.0 Ops/sec
string .match()	3592467.0 Ops/sec
indexOf === 0	6950780.0 Ops/sec
string .startsWith()	4266379.0 Ops/sec

Website performance monitoring

Script Preparation code:

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

Tests:

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