Ritalin for your <tt>$PS1</tt>

In my last post I shared my colorful but otherwise inert bash prompt. Pedro Melo extended it to integrate __git_ps1 with extra coloring using git status. Unfortunately this can take a long while on large source trees (git status needs to scan the directory structure), and while smart bash prompts are handy, it can be frustrating if every prompt incurs a delay. Of course this is annoying for any ov