Browser & Web Performance · Senior · Question 33 of 75
What is the main pitfall of a cache key that includes unnecessary request data, like all cookies?
- ✓Correct answer: The CDN hit rate drops sharply because almost every user gets a separate cache entry
- 2Responses are cached for less time
- 3The CDN must decompress every response
Explanation
Keep cache keys minimal and strip tracking query params. Personalize at the edge or on the client instead of fragmenting the cache.