Run results for: List iteration performance test 1

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Reduce	3893.2 Ops/sec
Map	9037.0 Ops/sec

Script Preparation code:

var data = [
    ...Array.from({
        length: 20000
    }, (_, i) => ({
        id: (20 + i).toString(),
        name: `Task ${20 + i}`,
        start_date: `2024-${String(Math.floor(Math.random() * 12) + 1).padStart(2, '0')}-01`,
        end_date: `2024-${String(Math.floor(Math.random() * 12) + 1).padStart(2, '0')}-28`,
        budgeted_hours: Math.floor(Math.random() * 100) + 1,
        status: "some status"
    })),
];

Tests:

Reduce
const result = data.reduce((acc, audit) => { acc.push({ id: audit.id, title: audit.name, startDate: audit.start_date, endDate: audit.end_date, budgetedHours: audit.budgeted_hours, status: audit.status, }); return acc; }, []);
Map
const result = data.map((audit, i) => { return { id: audit.id, title: audit.name, startDate: audit.start_date, endDate: audit.end_date, budgetedHours: audit.budgeted_hours, status: audit.status, } });

Run results for: List iteration performance test 1

Reduce

Map