promiseall-for-independent-operations

---

name: Promise.all() for Independent Operations impact: CRITICAL description: 2-10× improvement tags: async, parallelization, promises, waterfalls

Promise.all() for Independent Operations

When async operations have no interdependencies, execute them concurrently using Promise.all().

Incorrect (sequential execution, 3 round trips):

Copyconst user = await fetchUser()
const posts = await fetchPosts()
const comments = await fetchComments()

Correct (parallel execution, 1 round trip):

Copyconst [user, posts, comments] = await Promise.all([
  fetchUser(),
  fetchPosts(),
  fetchComments()
])