website very slow, my suggestion

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I see subscene using Cloudflare but haven't really taken advantage of it, it can be seen from the header cache-control: private which means the page will not be stored in the cloudflare cache.

Cloudflare has a very powerful static cache, based on my experience the cloudflare 'cache' can easily handle 50,000 online users without slowing down the website or causing downtime.

My advice:
- For pages and .zip files Use cache-control: public for users who are not logged in and set expiration in days
- Clear cache in Cloudflare manually if there is a page update