Re: A faster derived-mode-p

[Basil L. Contovounesios]

Dmitry Gutov <dgutov@yandex.ru> writes:

> On 14.02.2021 22:22, Lars Ingebrigtsen wrote:
>> There are only 11K commands in the Emacs tree, so I don't know whether
>> the current default completion predicate is going to turn out to be
>> problematically slow or not.
>
> I just evaluated
>
>   (length (cl-delete-if-not #'commandp obarray))
>
> in a running Emacs session with a bunch of third-party packages installed and
> loaded, and that still evaluated only to 1083.

That's not counting the obarray's buckets.  I get ~6x as many results in
my session with (length (all-completions "" obarray #'commandp)).

-- 
Basil