bug#63842: 30.0.50; Slow 'gnus-summary-refer-thread'

[Eli Zaretskii <eliz@gnu.org>]

> From: Andrew Cohen <cohen@bu.edu>
> Date: Sat, 01 Jul 2023 16:34:39 +0800
> 
> >>>>> "EZ" == Eli Zaretskii <eliz@gnu.org> writes:
> 
>     >> From: Manuel Giraud <manuel@ledu-giraud.fr> Cc: Eli Zaretskii
>     >> <eliz@gnu.org>, 63842@debbugs.gnu.org, cohen@andy.bu.edu Date:
>     >> Fri, 23 Jun 2023 12:00:45 +0200
>     >> 
>     >> Manuel Giraud <manuel@ledu-giraud.fr> writes:
>     >> 
>     >> [...]
>     >> 
>     >> >> To get everything right, any articles in the thread that need
>     >> to be >> added to the summary buffer have to be added to the
>     >> dependencies >> hash. In the case of searching we know exactly
>     >> which articles need to >> be added so we have no need for
>     >> 'gnus-read-all-available-headers to be >> non-nil: the "found"
>     >> articles are each added to the hash. The only >> case where
>     >> 'gnus-read-all-available-headers needs to be non-nil is >> when
>     >> we don't know exactly which articles are part of the thread in >>
>     >> which case we have to parse a larger set. This is what happens in
>     >> the >> 3rd case in the conditional (the "t" clause) in >>
>     >> 'gnus-summary-refer-thread. That is, this variable is only
>     >> relevant in >> those cases where we don't have a configured
>     >> search engine and just >> retrieve a lot of headers and hope for
>     >> the best. So the setting of >> 'gnus-read-all-available-headers
>     >> is just in the wrong place.
>     >> >
>     >> > Thanks.  I don't know for other backends/search engines but a
>     >> binding of > 'gnus-read-all-available-headers' to t elsewhere
>     >> will sure fix my > issue.
>     >> 
>     >> Hi Andrew,
>     >> 
>     >> I have seen your patch and it works as expected.
>     >> 'gnus-summary-refer-thread' is as fast as before for me.  Thanks.
> 
>     EZ> Thanks.  can the fix be installed and the bug closed then,
>     EZ> please?
> 
> Already installed (commit 1e13610b75718e7904f8af181fb73571639e1211). Bug
> can be closed.

Thanks, done.