Run results for: Array.every => Array.includes vs Array.every => Set.has

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: 26 days ago

Test name	Executions per second
Array.every => Array.includes	46419228.0 Ops/sec
Array.every => Set.has	34525136.0 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);

var set = new Set(selectedItems);

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

Tests:

Array.every => Array.includes
return object.items.every(({ id }) => selectedItems.includes(id));
return object.items.every(({ id }) => selectedItems.includes(id));
Array.every => Set.has
return object.items.every(({ id }) => set.has(id))
return object.items.every(({ id }) => set.has(id))