Benchmark: for vs foreach vs for..of vs for..of over entries vs for in 2 - MeasureThat.net

Script Preparation code:

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

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for
foreach
for..of
for..of over entries
for..in

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0

Browser/OS: Firefox 131 on Linux

View result in a separate tab

Test name	Executions per second
for	8424328.0 Ops/sec
foreach	7805745.5 Ops/sec
for..of	2149981.8 Ops/sec
for..of over entries	1562206.8 Ops/sec
for..in	485361.1 Ops/sec

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