Run results for: for vs foreach vs for..in vs for..of - add object property

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36

Browser: Chrome 146

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 4 months ago

foreach

1.6M/s

for..of

1.3M/s

for

807K/s

for in

118K/s

View exact numbers

Script Preparation code:

const objects = Array.from({ length: 1000 }, () => ({}));

Tests:

for
for (let i = 0, len = objects.length; i < len; i++) { objects[i].prop = 'erty'; }
foreach
objects.forEach(function(i) { i.prop = 'erty'; });
for in
for (let i in objects) { objects[i].prop = 'erty'; }
for..of
for (let i of objects) { i.prop = 'erty'; }