sequential vs parallel API

The page, request, or runtime feels stuck because one piece of work monopolizes the event loop. Dashboards, profile pages, and search screens often benefit from parallel loading.

Awaiting each independent request before creating the next one.

Move heavy work off the hot path, chunk it, stream it, cache it earlier, or run independent work in parallel.

const work = items.map(loadItem);
const results = await Promise.all(work);

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

Record blocked time or request duration before and after the fix; the event loop should stay responsive while work completes.