Run results for: ISO Datetime - add microseconds - replace vs slice

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5798.213 Safari/537.36

Browser: Chrome 114

Operating system: Mac OS X 10.3

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
replace	3666811.0 Ops/sec
slice	4464617.5 Ops/sec

Script Preparation code:

var strIn = '2023-12-18T12:30:00Z';
var strOut = '';

Tests: