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

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Run details:
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
Chrome 133
Mac OS X 10.15.7
Desktop
25 days ago
Test name Executions per second
Array.every Array.includes 102695384.0 Ops/sec
Array.every Set.has with Set creation 32997224.0 Ops/sec
HTML Preparation code:
AخA
 
1
<!--your preparation HTML code goes here-->
Script Preparation code:
​x
 
function generateTestData(size) {
    const items = Array.from({
        length: size
    }, (_, i) => ({
        id: i,
        name: `Item ${i}`
    }));
​
    // Randomly select ~75% of items
    const selectedItems = items
        .filter(() => Math.random() > 0.25)
        .map(item => item.id);
​
    return {
        bill: {
            items
        },
        selectedItems
    };
}
​
const dataSizes = [100, 1000, 10000, 100000, 1000000];
var data = generateTestData(Math.floor(Math.random() * 5));
​
var bill = data.bill;
var selectedItems = data.selectedItems;
Tests:

  • Array.every Array.includes

     
    const allSelected = bill.items.every(({ id }) => selectedItems.includes(id));
    return allSelected;

  • Array.every Set.has with Set creation

     
    const allSelected = ((selected) => 
              bill.items.every(({ id }) => selected.has(id))
            )(new Set(selectedItems));
    return allSelected;