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; rv:127.0) Gecko/20100101 Firefox/127.0

Browser: Firefox 127

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 4 months ago

Test name	Executions per second
regexp .test()	57274260.0 Ops/sec
string .match()	31060030.0 Ops/sec
indexOf === 0	1559193000.0 Ops/sec
string .startsWith()	1562620000.0 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://')