Run results for: Reduce vs map with empty filter

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
reduce	26005992.0 Ops/sec
map+filter	3810817.0 Ops/sec

Script Preparation code:

var arr = ['a', 'b', 'c'];

Tests:

reduce
arr.reduce((curr, acc) => { if(curr === 'a') return [...curr, acc]; return curr }, [])
map+filter
arr.map(curr => curr === 'a' ? curr : undefined).filter(Boolean)