Performance optimizations - Internalize after request

[tabacitu]

Let's discover WHAT are out weakest points. Our most expensive operations, and then we decide if we should do anything to speed them up.

Possible improvements we talked about:

• 1. MUST - generating a MAP of all files that are internalized (.basset file) - might save miliseconds on each page load;

• 2. SHOULD/COULD - moving the internalization process till AFTER the request has been served (deliver CDN asset to browser, then internalize in the same process, for the next request) - might save entire seconds, but only on first load;

[promatik]

1. generating a MAP of all files that are internalized (.basset file) - might save miliseconds on each page load;

Done with #27 🙌