Batching DB Requests with Promise.all

OPTIMIZATION TIP: Run Queries in Parallel

❌ Sequential — each waits for the previous to finish

const user = await getUser(id); // 100ms
const courses = await getCourses(id); // 100ms
const badges = await getBadges(id); // 100ms
// Total: ~300ms

✅ Parallel — all run at the same time

const [user, courses, badges] = await Promise.all([
getUser(id),
getCourses(id),
getBadges(id)
]);
// Total: ~100ms (3x faster!)

Note: Use this when queries are independent of each other.
Perfect for dashboard data loading!

#JavaScript #AsyncAwait #NodeJS