Run results for: filter_map vs reduce

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Safari/605.1.15

Browser: Safari 14

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
reduce	612.7 Ops/sec
filter_map	543.3 Ops/sec

Script Preparation code:

arr = [];
for (let i = 0; i < 100000; ++i) {
  arr.push({
    foo: Math.random() > 0.5,
    bar: Math.round(Math.random() * 10000),
  });
}

Tests:

reduce
const result = arr.reduce((acc, item) => { if (!item.foo) { acc.push(item.bar); } return acc; }, []);
filter_map
const result = arr .filter((item) => !item.foo) .map((item) => item.bar);