Here is the short plan:

1. Cache the feed at the edge for 60 seconds.
2. Revalidate in the background with stale-while-revalidate.
3. Purge on publish.

curl -I https://example.com/api/feed

Want me to wire the purge hook next?

Short version: cache the feed at the edge for 60 seconds and revalidate in the background. It keeps the page fast and the numbers fresh enough.