Benchmark: forEach vs reduce vs for vs map and filter

Script Preparation code:

var arr = [];
for (var i = 0; i < 12345; i++) {
  arr[i] = i;
}

function someFn(i) {
  return (i % 5);
}

var sumForEach = 0,
  sumReduce = 0,
  sumMap = 0,
  sumFilter = 0,
  sumFor = 0;

Tests:

forEach
let newArr = [] arr.forEach(item => { if(item) newArr.push(item) });
reduce
let newArr = arr.reduce((lastValue, item) => { if(item) lastValue.push(item); return lastValue }, []);
for
let newArr = [] for (let j of arr) { if(j) newArr.push(j); }
map and filter
let newArr = arr.map(a => a ? a : false).filter(a => a)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
forEach
reduce
for
map and filter

Fastest: N/A

Slowest: N/A

Latest run results:

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looping multiple times or just once over an array to map new values and filter the ouput

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

Created: 5 years ago by: Guest

Jump to the latest result

forEach

reduce

for

map and filter

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results