What are key elements to performance tweaking for example on a Raspberry Pi my average request with data takes 350-500 ms where a basic html file takes 25-35 ms*.

The distance between me and my server is 19 ms, home <-> data center.

I've disabled debugging (best left off anyway in a 'production' environment) yet this doesn't seem to speed it up the least. I've also ran php artisan optimize after I deployed my latest code.

Did I miss something or are these just the limits of my Raspberry Pi?

Edit: fetching the same data with my own code and processing it with Smarty works in 60-70 ms, is Laravel that heavy?