> you can’t imagine what’s a compute heavy endpoint

Indeed, I can't. Because "compute heavy" isn't a meaningful description. Is it written in C++? Are results persisted anywhere? Is it behind a queue? What is the caching strategy?

Given that original post mentions free Cloudflare tier, there is a good chance, that "compute" might mean something like "ordinary Python application, making several hundreds database requests". This is also a kind of high-load, but not the worst one by far.