Benchmark: foooorr - MeasureThat.net

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

let array = Array.from({length:1000},(i,ii)=>ii)
let iterator = array.values()
function forEach(o) {console.log(o ** 2)}

Tests:

for backwards
for (let {length} = array; length--;) console.log(array[length] ** 2)
for in
for (let i in array) console.log(array[i] ** 2)
for of
for (let o of array) console.log(o ** 2)
for
for (let i = 0, {length} = array; i < length; i++) console.log(array[i] ** 22)
forEach
array.forEach(forEach)
manual iterator
let {done, value} = iterator.next() while(!done) { ({done,value} = iterator.next()) console.log(value ** 2) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for backwards
for in
for of
for
forEach
manual iterator

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Safari/605.1.15

Browser/OS: Safari 18 on Mac OS X 10.15.7

View result in a separate tab

manual iterator

108.2M/s

for backwards

2K/s

for of

2K/s

for

2K/s

for in

2K/s

forEach

2K/s

View exact numbers

Test name	Executions per second
✓ manual iterator	108,212,456 Ops/sec
for backwards	2,441 Ops/sec
for of	2,436 Ops/sec
for	2,372 Ops/sec
for in	2,225 Ops/sec
forEach	2,129 Ops/sec

foooorr (version: 1)

Comparing performance of: `for backwards vs for in vs for of vs for vs forEach vs manual iterator`

Created: one year ago by: Guest

Go to the latest result

for backwards

for in

for of

for

forEach

manual iterator

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

foooorr (version: 1)

Comparing performance of: for backwards vs for in vs for of vs for vs forEach vs manual iterator

Created: one year ago by: Guest

Go to the latest result

for backwards

for in

for of

for

forEach

manual iterator

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `for backwards vs for in vs for of vs for vs forEach vs manual iterator`