Benchmark: forEach vs reduce vs map vs filter vs for vs forOf

Script Preparation code:

var arr = [];
for (var i = 0; i < 12345; i++) {
  arr[i] = i;
}

function someFn(i) {
  return (i * 3 * 8 / 1200 * 0.002 / 40 * 0.2);
}

var sumForEach = 0,
  sumReduce = 0,
  sumMap = 0,
  sumFilter = 0,
  sumFor = 0,
  sumForOf = 0;

Tests:

forEach
arr.forEach(item => sumForEach += someFn(item));
reduce
sumReduce = arr.reduce((lastValue, item) => { return sumReduce += someFn(item); });
map
arr.map(item => (sumMap += someFn(item)));
filter
arr.filter(item => (sumFilter += someFn(item)));
for
for (var j = 0; j < arr.length; j++) { sumFor += arr[j]; }
forOf
for (const num of arr) { sumForOf += num; }

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

forOf

706/s

forEach

562/s

filter

400/s

for

358/s

reduce

295/s

map

243/s

Fastest: forOf (2.9x faster)

View exact numbers

✓ forOf: 706 ops/sec
• forEach: 562 ops/sec
• filter: 400 ops/sec
• for: 358 ops/sec
• reduce: 295 ops/sec
• map: 243 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Test case name	Result
forEach
reduce
map
filter
for
forOf

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

forOf

379/s

reduce

258/s

forEach

256/s

filter

230/s

map

229/s

for

206/s

View exact numbers

Test name	Executions per second
✓ forOf	379 Ops/sec
reduce	258 Ops/sec
forEach	256 Ops/sec
filter	230 Ops/sec
map	229 Ops/sec
for	206 Ops/sec

forEach vs reduce vs map vs filter vs for vs forOf (version: 0) Benchmark.js

Comparing performance of: `forEach vs reduce vs map vs filter vs for vs forOf`

Created: 2 years ago by: Guest

Go to the latest result

forEach

reduce

map

filter

for

forOf

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

forEach vs reduce vs map vs filter vs for vs forOf (version: 0) Benchmark.js

Comparing performance of: forEach vs reduce vs map vs filter vs for vs forOf

Created: 2 years ago by: Guest

Go to the latest result

forEach

reduce

map

filter

for

forOf

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `forEach vs reduce vs map vs filter vs for vs forOf`