Run results for: loops: for vs foreach vs some vs for..of vs for..in

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.1.2

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
for	22840.6 Ops/sec
foreach	68750.7 Ops/sec
some	68774.0 Ops/sec
for..of	24159.8 Ops/sec
for..in	2622660.0 Ops/sec

Script Preparation code:

var array = new Array(1000);

Tests:

for
for (var i = 0; i < array.length; i++) { array[i]; }
foreach
array.forEach(function(i) { array[i]; });
some
array.some(function(i) { array[i]; });
for..of
for (var i of array) { array[i]; }
for..in
for (var i in array) { array[i]; }

Run results for: loops: for vs foreach vs some vs for..of vs for..in

Compare loop performance

for

foreach

some

for..of

for..in