Run results for: sum for vs foreach vs some vs for..of vs for with cached length

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

for with cached length

6.6M/s

for

4.9M/s

for..of

4.3M/s

foreach

3.8M/s

some

3.8M/s

View exact numbers

Script Preparation code:

var array = new Array(100);
for (let i = 0, end = array.length; i < end; i += 1) {
  array[i] = i;
}

Tests:

for
let sum = 0; for (var i = 0; i < array.length; i += 1) { sum += array[i]; }
foreach
let sum = 0; array.forEach(function(i) { sum += array[i]; });
some
let sum = 0; array.some(function(i) { sum += array[i]; });
for..of
let sum = 0; for (var i of array) { sum += array[i]; }
for with cached length
let sum = 0; for (var i = 0, end = array.length; i < end; i += 1) { sum += array[i]; }