Benchmark: test reduce vs flatMap

Script Preparation code:

window.providerMenuItems = Object.fromEntries(
  Array.from({ length: 1000 }).map((_, id) => [id, { id }]),
);
window.subtreeDishes = new Array(1000).fill(null).map((_, index) => ({
  id: index,
  child_ids: Array.from({ length: 10 }).map(() => Math.floor(Math.random() * 2000)),
}));

Tests:

reduce
subtreeDishes.reduce((res, dish) => { dish.child_ids.forEach((childId) => { if (providerMenuItems[childId]) { res.push(providerMenuItems[childId]); } }); return res; }, []);
flatMap + filter
subtreeDishes .flatMap((dish) => dish.child_ids.map((itemId) => providerMenuItems[itemId])) .filter((val) => val != null);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
reduce
flatMap + filter

Fastest: N/A

Slowest: N/A

Latest run results:

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Comparing performance of: reduce vs flatMap + filter

Created: 2 years ago by: Registered User

Jump to the latest result

reduce

flatMap + filter

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results