- When you update to HEAD make sure you enable the slime-repl contrib, otherwise you'll be stuck to an old-school inferior-lisp REPL, only.
Recommended: Use the slime-fancy meta contrib which enables various useful features you'll probably enjoy.
- C-u C-c C-c will compile the defun at point with maximum debug optimization setting. (SBCL only so far.)
- Bleeding edge feature: M-- C-c C-c will compile the defun at point with maximum speed optimization setting (still SBCL only.) This is very useful to benefit from SBCL's type inference and elicit compiler notes.