Run results for: String.split: Random vs Fixed strings

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36

Browser: Chrome 81

Operating system: Mac OS X 10.15.3

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Fixed	796745.8 Ops/sec
Random	752703.9 Ops/sec

Script Preparation code:

function gen() {
	let ret = Math.floor(Math.random() * (2**64));
    return (ret > Math.pow(10, 19) ? ret : ret +  1 + Math.pow(10, 19)).toString();
}
const sameDigits = gen();

var generateDigits = (same) => { 
	const ret = gen();
    return same > 0 ? sameDigits : ret;
}

Tests:

Fixed
const sum = generateDigits(true).split('').reduce((prev, curr) => prev + +curr, 0);
Random
const sum = generateDigits(false).split('').reduce((prev, curr) => prev + +curr, 0);