40 lines
985 B
Markdown
40 lines
985 B
Markdown
# Runtime Selection
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## Use Node.js Runtime by Default
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Use the default Node.js runtime for new routes and pages. Only use Edge runtime if the project already uses it or there's a specific requirement.
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```tsx
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// Good: Default - no runtime config needed (uses Node.js)
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export default function Page() { ... }
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// Caution: Only if already used in project or specifically required
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export const runtime = 'edge'
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```
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## When to Use Each
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### Node.js Runtime (Default)
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- Full Node.js API support
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- File system access (`fs`)
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- Full `crypto` support
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- Database connections
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- Most npm packages work
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### Edge Runtime
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- Only for specific edge-location latency requirements
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- Limited API (no `fs`, limited `crypto`)
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- Smaller cold start
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- Geographic distribution needs
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## Detection
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**Before adding `runtime = 'edge'`**, check:
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1. Does the project already use Edge runtime?
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2. Is there a specific latency requirement?
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3. Are all dependencies Edge-compatible?
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If unsure, use Node.js runtime.
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