[Bug cli/15548] Limit completions to a pre-defined limit when completions list is very large

["manu at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=15548

--- Comment #13 from Manuel LÃpez-IbÃÃez <manu at gcc dot gnu.org> ---
(In reply to Gary Benson from comment #9)
> After having implemented this
> (https://sourceware.org/ml/gdb-patches/2014-02/msg00398.html) I'm coming to
> the conclusion that you can't rememdy this problem this way.

At least you can alleviate it!

> This list only has 875 candidates, but GDB still has to expand pretty much
> every symbol table to root them all out.  A limit of 1000 here will not stop
> the user seeing a lengthy pause.

The two issues seem to be important to fix. And the issue here already has a
patch that is basically approved!

The problem is not only a lengthy pause (which is annoying but it is a
different issue), it is also that after the pause, Emacs may spend a several
*minutes* printing candidates, slowing the whole computer down with it. A limit
of 1000 seems almost too much, 150 or so seems much more manageable.

Please, can you commit your patch so at least there is some progress on this?

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