Run results for: What is the best for the index in the loop let or const ?

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:73.0) Gecko/20100101 Firefox/73.0

Browser: Firefox 73

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
let	131207.9 Ops/sec
const	129981.9 Ops/sec

Script Preparation code:

var arr = [];

for (let i = 0; i < 1000; i++) {
	arr[i] = i;
}

function someFn(i) {
	return i * 3 * 8;
}

Tests: