Cursor
performance
Cache-Control Headers Set Incorrectly
After Cursor refactored your server response headers, caching is not working correctly. Either assets are cached too long (users see stale content) or not cached at all (every request hits server).
Cache-Control headers were changed incorrectly.
Error Messages You Might See
Users see stale content
Every request hits server
Cache not being used
Assets downloaded repeatedly
Common Causes
- Cache-Control header removed entirely
- Max-age set to 0, disabling all caching
- No-cache or no-store applied to static assets
- Immutable directive removed from versioned assets
- Different headers applied to HTML vs CSS/JS
How to Fix It
Static assets (hashed): Cache-Control: max-age=31536000, immutable. HTML: max-age=0, no-cache (always revalidate). API: appropriate based on data freshness. Use ETag for validation. Test with DevTools Network tab.
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Get HelpFrequently Asked Questions
How do I cache bust versioned assets?
Use content hash in filename (app.abc123.js). Set long max-age. HTML loads correct version number.
What's the difference between cache-control directives?
no-cache: revalidate before use. no-store: don't cache. max-age: seconds to cache. immutable: never changes.