Run results for: for vs forEach vs for-of vs for-reverse (calculate sum) - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:97.0) Gecko/20100101 Firefox/97.0

Browser: Firefox 97

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
for	8274042.5 Ops/sec
forEach	3496386.0 Ops/sec
for-of	1085609.8 Ops/sec
for-reverse	7302748.5 Ops/sec

Script Preparation code:

var array = Array.from({length: 100}, (_, index) => index);

Tests:

for
var sum = 0 for (var i = 0; i < array.length; i++) { sum += array[i]; }
forEach
var sum = 0 array.forEach(function(item) { sum += item; });
for-of
var sum = 0 for (var item of array) { sum += item; }
for-reverse
var sum = 0 for (var i = array.length; i--;) { sum += array[i]; }

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