Run results for: charAt vs split

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; GM1913) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Mobile Safari/537.36

Browser: Chrome Mobile 81

Operating system: Android

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
charAt	516805.9 Ops/sec
split	1711309.0 Ops/sec

Script Preparation code:

var digits = '06325112733';

Tests:

charAt
let sum = 0; var digitsLength = digits.length; for (let i = 0; i < digitsLength; ++i) { var digit = +digits.charAt(i); sum += digit * (digitsLength + 1 - i); } var lastSumChecker = sum % 11; var checker = lastSumChecker < 2 ? 0 : 11 - lastSumChecker; return checker;
split
let sum = 0; var digitsLength = digits.length; sum = digits.split('').reduce((prev, curr, index) => { var current = +curr; return prev + current * (digitsLength + 1 - index); }, 0); var lastSumChecker = sum % 11; var checker = lastSumChecker < 2 ? 0 : 11 - lastSumChecker; return checker;