Run results for: 3 different for loops vs foreach() vs some() vs for..of

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 Edg/145.0.0.0

Browser: Chrome 145

Operating system: Windows

Device Platform: Desktop

Date tested: 5 months ago

some

7.5M/s

foreach

7.3M/s

backward for

6.2M/s

for (static length)

5.5M/s

for (dynamic length)

4.1M/s

for..of

895K/s

View exact numbers

Script Preparation code:

var array = new Array(100);

Tests:

for (dynamic length)
var i = 0; for (; 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 (static length)
var len = array.length var i = 0; for (; i < len; ++i) { array[i]; }
backward for
var i = array.length - 1 for (; i >= 0; --i) { array[i]; }