My-Weekly-ToDo-List/.opencode/skills/web-design-guidelines/react-best-practices/rules/async-parallel.md
mARTin d92a8c7210 feat: add task actions (notes/delete) and refine animation logic
- Added 'onDelete' and 'onNotes' support to TaskItem.
- Implemented hover actions (Delete and Notes icons) for tasks.
- Added Notes Modal for editing task markdown content.
- Simplified navigation animation to remove blank flash (single-phase slide-in).
- Fixed syntax error in updateTask function.
- Updated styles for modal and task actions.
2026-02-01 12:25:53 +01:00

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title impact impactDescription tags
Promise.all() for Independent Operations CRITICAL 2-10× improvement 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):

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

Correct (parallel execution, 1 round trip):

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