async dependencies

title: Dependency-Based Parallelization impact: CRITICAL impactDescription: 2-10× improvement tags: async, parallelization, dependencies, better-all

Dependency-Based Parallelization

For operations with partial dependencies, use better-all to maximize parallelism. It automatically starts each task at the earliest possible moment.

Incorrect (profile waits for config unnecessarily):

const [user, config] = await Promise.all([
  fetchUser(),
  fetchConfig()
])
const profile = await fetchProfile(user.id)

Correct (config and profile run in parallel):

import { all } from 'better-all'

const { user, config, profile } = await all({
  async user() { return fetchUser() },
  async config() { return fetchConfig() },
  async profile() {
    return fetchProfile((await this.$.user).id)
  }
})

Reference: https://github.com/shuding/better-all

本文档为站内渲染。原始文件本地路径：saas/source/knowledge-world/Knowledge-World-项目-Practice-Claude-Skills-vercel-react-best--e9a9d3.md（仅本地保留，不入库不部署）