Run results for: replace vs charAT for Capitalise helper app

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.54 Safari/537.36

Browser: Chrome 94

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
charAt() & slice()	2516412.2 Ops/sec
replace()	1646541.5 Ops/sec

Script Preparation code:

var str = 'foo bar baz';
var capstr = 'Foo bar baz';
var noop = Function.prototype;

Tests:

charAt() & slice()
if (str.charAt(0).toUpperCase() + str.slice(1) === capstr) noop();
replace()
if (str.replace(/^\w/, c => c.toUpperCase()) === capstr) noop();