parallel Promise.all

The UI, test, redirect, or log moves forward before the async result is actually ready. This pattern reduces latency for independent dashboard or page data.

Using `Promise.all` after already awaiting each item.

Await real dependencies, start independent work together, and choose the loop pattern that matches the behavior you need.

const [user, posts] = await Promise.all([
  fetchUser(),
  fetchPosts()
]);

The console lane proves the visible order: done. The active line and queues show why source order changed.

Measure before and after with logs or test spies: the dependent line should run only after the awaited operation finishes.