Run results for: char index vs charAt() vs slice() vs startsWith() vs RegExp bmk2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36

Browser: Chrome 96

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Tests:

character index
const str = '!foo bar baz'; const noop = Function.prototype; if (str[0] === '!') noop();
charAt()
const str = '!foo bar baz'; const noop = Function.prototype; if (str.charAt(0) === '!') noop();
startsWith()
const str = '!foo bar baz'; const noop = Function.prototype; if (str.startsWith('!')) noop();
slice()
const str = '!foo bar baz'; const noop = Function.prototype; if (str.slice(0, 1) === '!') noop();
RegExp
const str = '!foo bar baz'; const noop = Function.prototype; const pattern = /^!/; if (pattern.test(str)) noop();