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aris/.claude/skills/vercel-react-best-practices/rules/async-parallel.md
kenneth 331a2596fa Add Claude skills for React best practices and web design 
- react-best-practices: Performance optimization patterns (client-side only)
- web-design-guidelines: UI review against Web Interface Guidelines

Co-authored-by: Ona <no-reply@ona.com>
2026-01-17 11:53:08 +00:00

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title, impact, impactDescription, tags
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()
])