Run results for: filter + map vs reduce

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
filter + map	121.3 Ops/sec
reduce	127.9 Ops/sec

Script Preparation code:

var arr = []
for (var i = 0; i < 1000000; i++) {
  arr.push({ Status: Math.random() > 0.5 ? 'Active': 'NotActive' })
}

Tests:

filter + map
arr.filter(item => item.Status !== 'NotActive').map(item => { status: item.Status })
reduce
arr.reduce((acc, item) => { if (item.Status !== 'NotActive') { acc.push({ status: item.Status }) return acc } return acc }, [])