Run results for: Array looping - for, Array.forEach, for-of, array.entries() - V2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 4 months ago

Test name	Executions per second
Simple for loop - Access index and value	142464.1 Ops/sec
Array.forEach - Access index and value	96111.9 Ops/sec
for-of + Array.entries	63424.0 Ops/sec
for-of - Access value only	107774.0 Ops/sec
Simple for loop - Access value only	147837.8 Ops/sec
Array.forEach - Access value only	94079.0 Ops/sec

Script Preparation code:

var arr = [];
var res = [];

for( var cpt = 0; cpt < 1000; cpt++ ) {
  arr.push(Math.random());
}

Tests:

Simple for loop - Access index and value
res = []; const len = arr.length; for(let i = 0; i < len; ++i) { res[i] = arr[i]; } console.log(res);
Array.forEach - Access index and value
res = []; arr.forEach((value, i) => { res[i] = value; }); console.log(res);
for-of + Array.entries
res = []; for(const [i, value] of arr.entries()) { res[i] = value; } console.log(res);
for-of - Access value only
res = []; for(const value of arr) { res.push(value); } console.log(res);
Simple for loop - Access value only
res = []; const len = arr.length; for(let i = 0; i < len; ++i) { res.push(arr[i]); } console.log(res);
Array.forEach - Access value only
res = []; arr.forEach((value) => { res.push(value); }); console.log(res);