Run results for: for vs foreach vs for..of vs for..of over entries random - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:93.0) Gecko/20100101 Firefox/93.0

Browser: Firefox 93

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
for	8965268.0 Ops/sec
foreach	7487392.0 Ops/sec
for..of	1693839.8 Ops/sec
for..of over entries	302003.7 Ops/sec

Script Preparation code:

var array = Array.from({length: 100}).map(el => Math.floor(Math.random() * 1000))
var t;

Tests:

for
for (let i = 0; i < array.length; i++) { t = array[i] * 2; }
foreach
array.forEach(function(v, i) { t = v * 2; });
for..of
for (var v of array) { t = v * 2; }
for..of over entries
for (var [i, v] of array.entries()) { t = v * 2; }

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