The fastest theme

Hi support,

sorry for the stupid question but I decided to give it a try.

I want to squeeze as much as possible from every single line of code for our project. So, I am considering to switch from our current theme to one made by GD/you.

Which from all GeoDirectory produced themes is the fastest?

I am considering this switch because I suppose the theme created by the same team as the plugin should have the best compliance and speed. Am I guessing right here?

Is the best way to use the GD framework (backbone to build my child theme from scratch) or you would suggest some of your child themes to kick off?

Again squeezing every single line of code (html, css, js, queries) for the best possible performance is MY GOAL.

Thanks in advance!