Current findings: (cask-initialize) adds almost a whole second to load time
cask-initialize is adding about 1s to load time. Exec path from shell was adding about 700ms to load time. Deffered execution of exec-path-from-shell-initialize using use-package
Findings: calling cask-initialize adds approx. 1s to load time.

Calling exec-path-from-shell-initialize also adds approx 1s to load time. The other 1s in load time is spent in running the customization lisp code