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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 14

Operating system: iOS 14.7.1

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
regexp .test()	9167498.0 Ops/sec
string .match()	6969647.0 Ops/sec
indexOf === 0	8931905.0 Ops/sec
string .startsWith()	10449830.0 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('http://') === 0
string .startsWith()
html.startsWith('https://')

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

regexp .test()

string .match()

indexOf === 0

string .startsWith()