Run results for: reduce spread push vs flatmap

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var arr = Array(10_000).fill(0)
function getErrors() {
  const num = Math.floor(Math.random() * 4);
  return Array(num).fill("string");
}

Tests:

flatMap
arr.flatMap(x => getErrors())
reduce spread push
arr.reduce((errors, x) => { errors.push(...getErrors()); return errors; }, [])
reduce append
arr.reduce((errors, x) => { errors.concat(getErrors()); return errors; }, [])