Run results for: for vs foreach vs some vs for..of vs for cached length - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.192 Safari/537.36

Browser: Chrome 88

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
for	2683.5 Ops/sec
foreach	290621.3 Ops/sec
some	274284.8 Ops/sec
for..of	6543.2 Ops/sec
for cached length	7672.1 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 cached length
for (var i = 0, l=array.length; i < l; ++i) { array[i]; }