Re: [PATCH] Fixing refile cache use for org-goto in indirect buffers.

[Yuchen Pei]

Thanks for the reply.
On Mon 2022-09-19 22:48:34 +0700, Max Nikulin wrote:

> On 19/09/2022 12:16, Yuchen Pei wrote:
>> To reprod:
>> - make sure the org-refile-targets generates a big enough list where
>>    the refile cache makes a difference
>> - visit an org file in org-refile-targets
>> - M-x clone-indirect-buffer-other-window
>> - C-0 C-c C-w to clear cache
>> - M-: (org-refile-get-targets)
>
> Have you tried to execute this command in the indirect buffer?

Yes, and it would be instant (assuming (org-refile-get-targets) has been
run in the original buffer).  This is because the code path from
org-goto has an overriding local binding of org-refile-targets to `((nil
. (:maxlevel . ,org-goto-max-level)) before calling
org-refile-get-location which calls org-refile-get-targets.

>
>> - org-goto in the original buffer takes no effort
>> - but, org-goto in the indirect buffer takes time, which is unexpected.
>
>> diff --git a/lisp/org-refile.el b/lisp/org-refile.el
>> index 16cff25bd..7189ef595 100644
>> --- a/lisp/org-refile.el
>> +++ b/lisp/org-refile.el
>> @@ -306,7 +306,10 @@ converted to a headline before refiling."
>>      (dolist (f files)
>>        (with-current-buffer (if (bufferp f) f (org-get-agenda-file-buffer f))
>>          (or
>> -         (setq tgs (org-refile-cache-get (buffer-file-name) descre))
>> +         (setq tgs (org-refile-cache-get
>> +                        (buffer-file-name (when (bufferp f)
>> +                                            (buffer-base-buffer f)))
>> +                        descre))
>
> Thank you for the attempt to improve handling of indirect buffers.
>
> I am afraid, more serious refactoring is required to reuse result of
> `buffer-base-buffer', for the previous attempt to avoid issues with
> `buffer-file-name' see
> satotake to emacs-orgmode… [PATCH] org-refile.el: Fix the case of
> *scratch* buffer. Sat, 15 May 2021 19:38:39
> +0900. 
> https://list.orgmode.org/20210515103839.8574-2-doublequotation@gmail.com
>
> There are several corner cases with `org-refile-cache', `org-goto',
> and buffers.
> - Perhaps buffer name, not file name should be used as the cache key
>   if some buffer is not associated with any file. Alternatively cache
>   should not be used at all.

It seems there may be problem with this idea.  If buffer name is the
key, that will mean a buffer and its indirect clone will generate two
caches, which duplicates the work, no?

> - When an indirect buffer is narrowed down to some region
>   (e.g. created using `org-tree-to-indirect-buffer') jump targets
>   should be filtered to the displayed range.
>
> So the change is an improvement (I would prefer `and' instead of
> `when' in such expression, but it does not really matter). Leaving
> aside other issues and more serious refactoring, it seems, storing
> results to the cache requires a similar fix, so perhaps it is possible
> to move "(setq f ...)" code above of "(or ...)" and reuse f as the
> cache key.

Sure, I will update my patch when I get around to it again.

>
> Please, send patches produced by "git format-patch" command.
>

I guess you had some problem applying the patch?  I did use
(ma)git-format-patch, but had some difficulty of getting gnus to send
the formatted patch (I basically visited the patch file and ran
(message-mode), but it was missing a few header fields compared to
composing a new mail from gnus, so I manually copied over these fields).
This was why I sent two emails.  The first one[1] had an odd extra bit
of Message-ID at the bottom of the message.  Is this the one you were
referring to as not being "standard", or is the other one[2] also not
quite right?

[1] https://lists.gnu.org/archive/html/emacs-orgmode/2022-09/msg00322.html
[2] https://lists.gnu.org/archive/html/emacs-orgmode/2022-09/msg00323.html

Best,
Yuchen

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