I fixed my slow https serving on my VPS, but why?

[albcunha]

I use Hostinger as provider, in Brazil region. I bought a domain in spaceship.com and I set it accordingly. I installed dokploy on ubuntu with the web config provided by hostinger to my vps. It was painfully slow. I did some times, serving my built react app as a static website and the https version of it, served by dokploy was about 10x or more slower(!) than serving it ont he ip of my VPS. I tried everything from foruns to fix traefic and make it faster.

It didnt work.

I reinstalled a clean ubuntu OS on the VPS, installed nginx and certbot and, for my surprise, it was painfully slow.

I tried all different configs and changes on dns records, and nothing worked.

Then, I changed the nameserver from spaceship.com to cloudflare and now everything works fast!

The problem is that, for me, that does not make sense. What I am missing? I reinstalled dokploy and when I define a domain, I see it says "behind CloudFlare" instead of "valid (or something similar).

Can anyone explain to me why this changed affected my server so much (positively)?

[Serhioromano]

When you use cloudflare you use passthough on DNS? I mean may be CF is just caching?

[ChiefC0de]

What's your workaround? Found something