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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Firefox/68.0

Browser: Firefox 68

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
for	1125724.0 Ops/sec
foreach	6955559.0 Ops/sec
some	6476456.0 Ops/sec
for..of	77819.2 Ops/sec

Website performance monitoring

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]; }