Run results for: reduce vs filter+map on one million

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36

Browser: Chrome 143

Operating system: Windows

Device Platform: Desktop

Date tested: 5 months ago

Test name	Executions per second
reduce	134.8 Ops/sec
filter+map	101.4 Ops/sec

Script Preparation code:

var items = [];
for (var i = 0; i < 1000000; i++) {
  items[i] = {
    id: i,
    selected: i % 4 == 0
  };
}

Tests:

reduce
items.reduce( ( array, item ) => { if ( item.selected ) { array.push( item.id ); } return array; }, [] );
filter+map
items.filter( x => x.selected ).map( x => x.id );