Benchmark: for-vs-foreach-vs-forof

Script Preparation code:

var arr = [];
for (var i = 0; i < 1000; i++) {
  arr[i] = i;
}
function someFn(i) {
  return i * 3 * 8;
}

Tests:

forEach
arr.forEach(function (item){ someFn(item); });
for
for (var i = 0, len = arr.length; i < len; i++) { someFn(arr[i]); }
for of
for(xxx of arr){ someFn(xxx); }
arrowForEach
arr.forEach((item)=>{ someFn(item); });
forBackward
for (var i=arr.length-1; i>=0; i--) { someFn(arr[i]); }
reverse while
var i = arr.length; while (i--) { someFn(arr[i]); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
forEach
for
for of
arrowForEach
forBackward
reverse while

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.97 Safari/537.36 Vivaldi/1.94.1008.36

Browser/OS: Chrome 62 on Mac OS X 10.13.2

View result in a separate tab

Test name	Executions per second
forEach	9883.5 Ops/sec
for	5447.3 Ops/sec
for of	1780.0 Ops/sec
arrowForEach	10091.3 Ops/sec
forBackward	5717.7 Ops/sec
reverse while	5604.5 Ops/sec

for-vs-foreach-vs-forof (version: 0)

Comparing performance of: forEach vs for vs for of vs arrowForEach vs forBackward vs reverse while

Created: 6 years ago by: Guest

Jump to the latest result

forEach

for

for of

arrowForEach

forBackward

reverse while

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A