Benchmark: Performance of JavaScript .forEach, .map and .reduce vs for and for..ofdasdadadasd ca2qdd

Script Preparation code:

function generateTestArray() {
  const result = [];
  for (let i = 0; i < 1000000; ++i) {
    result.push({
      a: i,
      b: i / 2,
      r: 0,
    });
  }
  return result;
}

Tests:

.forEach
const array = generateTestArray(); array.forEach((x) => { x.r = x.a + x.b; });
for..of
const array = generateTestArray(); for(const x of array) { x.r = x.a + x.b; }
.map
const array = generateTestArray(); array.map(x => x.a + x.b)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
.forEach	11.9 Ops/sec
for..of	15.1 Ops/sec
.map	9.0 Ops/sec

Performance of JavaScript .forEach, .map and .reduce vs for and for..ofdasdadadasd ca2qdd (version: 0)

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

Created: one year ago by: Guest

Jump to the latest result

.forEach

for..of

.map

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A