Run results for: Looping with Index: forEach vs array.entries vs for of

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36 Edg/143.0.0.0

Browser: Chrome 143

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 8 months ago

for

515/s

forEach

468/s

array.entries

462/s

View exact numbers

Script Preparation code:

const arr = Array.from({length: 1000}, () => Math.floor(Math.random() * 40));

Tests:

forEach
arr.forEach((item, index) => console.log(item + index))
array.entries
for(var [index, item] of arr.entries()){ console.log(item + index); }
for
for( var index = 0; index < arr.length; index++ ){ console.log(arr[index] + index); }