Promise.all() for Independent Operations
When async operations have no interdependencies, execute them concurrently using Promise.all().
Incorrect (sequential execution, 3 round trips):
typescript
const user = await fetchUser(); const posts = await fetchPosts(); const comments = await fetchComments();
Correct (parallel execution, 1 round trip):
typescript
const [user, posts, comments] = await Promise.all([ fetchUser(), fetchPosts(), fetchComments(), ]);