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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/121.0.6167.171 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 121

Operating system: iOS 17.3

Device Platform: Mobile

Date tested: 2 years ago

some

9.6M/s

foreach

491K/s

for..of

145K/s

for

131K/s

View exact numbers

Test name	Executions per second
✓ some	9,646,490 Ops/sec
foreach	490,915 Ops/sec
for..of	145,323 Ops/sec
for	130,820 Ops/sec

Script Preparation code:

var array = new Array(100);

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]; }

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

Compare loop performance

for

foreach

some

for..of