Better front end performance in Drupal
My site is now powered by Jekyll and located in this repository.
This is how I handle things on this site:
Exclude unnecessary CSS files
Inspired by the Tao theme I've excluded a couple CSS files from core and contrib. They're only causing damage by increasing the amount of kb served. And not just be simply existing but also forcing me to override them in my theme if they weren't excluded.
Decrease the number of HTTP requests