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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4595.0 Safari/537.36

Browser: Chrome 94

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
regexp .test()	7049535.0 Ops/sec
string .match()	5416924.0 Ops/sec
indexOf === 0	5682557.0 Ops/sec
string .startsWith()	4860154.0 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://')