Benchmark: forEach vs reduce vs map vs filter vs for vs for..of big list

Script Preparation code:

var arr = [];
for (var i = 0; i < 1000000; 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;

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
var lenght = arr.length; for (var j = 0; j < lenght; j++) { sumFor += arr[j]; }
for..of
for (const item of arr) { sumFor += item; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
forEach
reduce
map
filter
for
for..of

Fastest: N/A

Slowest: N/A

Latest run results:

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forEach vs reduce vs map vs filter vs for (slightly optimized for, fixed fn)
forEach vs reduce vs map vs filter vs for (slightly optimized for (fixed))

forEach vs reduce vs map vs filter vs for vs for..of big list (version: 0)

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

Created: 4 years ago by: Guest

Jump to the latest result

forEach

reduce

map

filter

for

for..of

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results