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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:134.0) Gecko/20100101 Firefox/134.0

Browser: Firefox 134

Operating system: Linux

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
for	7362090.5 Ops/sec
foreach	6073064.0 Ops/sec
for..of	1755584.2 Ops/sec
for..of over entries	888016.8 Ops/sec
for..in	533236.2 Ops/sec

Script Preparation code:

var array = Array.from({length: 100});
var t;

Tests:

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