Benchmark: flat vs forEach - MeasureThat.net

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const createNestedArray = (depth, width) => {
  let arr = [];
  for (let i = 0; i < width; i++) {
    arr.push(Array.from({ length: depth }, (_, j) => j));
  }
  return arr;
};

const depth = 1000;
const width = 100;
const nestedArray = createNestedArray(depth, width);

Tests:

flat()
nestedArray.flat();
forEach()
const flattened = []; nestedArray.forEach(subArray => { flattened.push(...subArray); });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
flat()
forEach()

Fastest: N/A

Slowest: N/A

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/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

forEach()

809/s

flat()

416/s

View exact numbers

Test name	Executions per second
✓ forEach()	809 Ops/sec
flat()	416 Ops/sec

flat vs forEach (version: 1)

Comparing performance of: `flat() vs forEach()`

Created: one year ago by: Guest

Go to the latest result

flat()

forEach()

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

flat vs forEach (version: 1)

Comparing performance of: flat() vs forEach()

Created: one year ago by: Guest

Go to the latest result

flat()

forEach()

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Comparing performance of: `flat() vs forEach()`