Run results for: index array vs cache indexed value

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36 Edg/133.0.0.0

Browser: Chrome 133

Operating system: Windows

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
cached indexed value	14675.0 Ops/sec
index each iteration	7606.6 Ops/sec

Script Preparation code:

var arr = [];
for(let i = 0; i < 10000; i++) {
  arr.push(Math.random());
}
var arrLength = arr.length;

AخA
 
var arr = [];for(let i = 0; i < 10000; i++) {  arr.push(Math.random());}var arrLength = arr.length;

Tests:

let sum = 0;
for(let i = 0; i < arrLength; i++) {
	const el = arr[i];
  	sum += el;
    sum += el;
    sum += el;
    sum += el;
    sum += el;
}

 
let sum = 0;for(let i = 0; i < arrLength; i++) {    const el = arr[i];    sum += el;    sum += el;    sum += el;    sum += el;    sum += el;}

let sum = 0;
for(let i = 0; i < arrLength; i++) {
  sum += arr[i];
  sum += arr[i];
  sum += arr[i];
  sum += arr[i];
  sum += arr[i];
}

 
let sum = 0;for(let i = 0; i < arrLength; i++) {  sum += arr[i];  sum += arr[i];  sum += arr[i];  sum += arr[i];  sum += arr[i];}