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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6 Safari/605.1.15

Browser: Safari 15

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
regexp .test()	12251850.0 Ops/sec
string .match()	7960018.0 Ops/sec
indexOf === 0	10388380.0 Ops/sec
string .startsWith()	13038390.0 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://')