Re: A faster derived-mode-p

[Dmitry Gutov]

On 15.02.2021 00:45, Basil L. Contovounesios wrote:
> That's not counting the obarray's buckets.  I get ~6x as many results in
> my session with (length (all-completions "" obarray #'commandp))

Oh, you're right, thanks. Still, that gives an estimate of how many 
times the function will be called in an average session.

And

  (benchmark 10000 '(derived-mode-p 'prog-mode))

prints ~0.01s here (unless caught in a GC).