Run results for: Array.every => Array.includes vs Array.every => Set.has with new Set() creation

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Array.every => Array.includes

16.1M/s

Array.every => Set.has with new Set() creation

857K/s

View exact numbers

Test name	Executions per second
✓ Array.every => Array.includes	16,068,026 Ops/sec
Array.every => Set.has with new Set() creation	856,560 Ops/sec

Script Preparation code:

var object = {
    items: Array.from({
        length: 100
    }, (_, i) => ({
        id: i,
        name: `Item-${i}`,
    }))
};

// Randomly select ~75% of items
var selectedItems = object.items
    .filter(() => Math.random() > 0.25)
    .map(item => item.id);

Tests:

Array.every => Array.includes
return object.items.every(({ id }) => selectedItems.includes(id));
Array.every => Set.has with new Set() creation
return ((selected) => object.items.every(({ id }) => selected.has(id)))( new Set(selectedItems) );