Benchmark: Looping with Index: forEach vs array.entries vs for

Script Preparation code:

var arr = [1,2,3,4,5];

AخA
 
var arr = [1,2,3,4,5];

Tests:

forEach
arr.forEach((item, index) => console.log(item + index))
arr.forEach((item, index) => console.log(item + index))
array.entries
for(var [index, item] in arr.entries()){ console.log(item + index); }
for(var [index, item] in arr.entries()){
console.log(item + index);
}

for

for( var index = 0; index < arr.length; index++ ){
  console.log(arr[index] + index);
}

 
for( var index = 0; index < arr.length; index++ ){  console.log(arr[index] + index);}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
forEach
array.entries
for

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
forEach	14911.1 Ops/sec
array.entries	25973474.0 Ops/sec
for	17936.0 Ops/sec

Looping with Index: forEach vs array.entries vs for (version: 1)

Comparing performance of: forEach vs array.entries vs for

Created: 5 months ago by: Guest

Jump to the latest result

forEach

array.entries

for

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A