ginnoir
3d825fba20
Adds the Vercel skill under .agents with famapp path patterns. Includes skills-lock.json pin.
25 lines
650 B
Markdown
25 lines
650 B
Markdown
---
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title: Promise.all() for Independent Operations
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impact: CRITICAL
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impactDescription: 2-10× improvement
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tags: async, parallelization, promises, waterfalls
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---
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## Promise.all() for Independent Operations
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When async operations have no interdependencies, execute them concurrently using `Promise.all()`.
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**Incorrect (sequential execution, 3 round trips):**
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```typescript
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const user = await fetchUser();
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const posts = await fetchPosts();
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const comments = await fetchComments();
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```
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**Correct (parallel execution, 1 round trip):**
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```typescript
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const [user, posts, comments] = await Promise.all([fetchUser(), fetchPosts(), fetchComments()]);
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```
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