Re: Help speeding up Org iCal export

[Ken Mankoff <mankoff@gmail.com>]

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Hi Nicolas,

Thank you for providing suggestions about the appropriate tool. I've
profiled it, examined the variables you suggested, but am not sure what
next steps to take. I hope it is OK that I post questions about this on
this list...

On Thu, May 28, 2020 at 5:17 AM Nicolas Goaziou <mail@nicolasgoaziou.fr>
wrote:

> Ken Mankoff <mankoff@gmail.com> writes:
>
> > When I eval `(org-icalendar-combine-agenda-files nil)`, it takes about
> > 15 seconds.
>
> OK. You may want to profile this, or use ELP.
>

Output from the profiler is here: https://pastebin.com/QvL9w69R but the key
lines seems to be:

      - org-icalendar-combine-agenda-files                      15540  83%
       - apply                                                  15540  83%
        - org-icalendar--combine-files                          15540  83%
         - mapconcat                                            15536  83%
          - #<compiled 0x15879b1>                               15536  83%
           - org-export-as                                      15162  81%
            - org-export-data                                    6493  34%
             - mapconcat                                         6493  34%
              - #<compiled 0x25baf9d>                            6493  34%
               - org-export-data                                 6493  34%
                - mapconcat                                      6164  33%
                 - #<compiled 0x22864b5>                         6160  33%
                  - org-export-data                              6156  33%
                   - mapconcat                                   5674  30%

with org-export-data and mapconcat repeating, AND

                        - mapc                                   5672  30%
                         - #<compiled 0x3129c91>                 5672  30%
                          - mapc                                 5672  30%
                           - #<compiled 0x3129c91>               5668  30%
                            - #<compiled 0x15b2141>               4392  23%
                             - org-id-find                       4392  23%
                              - org-id-update-id-locations
4376  23%
                               - org-map-entries                 3696  19%
                                - org-scan-tags                  3668  19%
                                 + #<lambda 0x22c5233ea>                990
  5%
                                 + #<lambda 0x22c5233ea>                879
  4%
                                 + #<lambda 0x22c5233ea>                830
  4%



> Some strange messages in the *Messages* buffer include:

> >
> > 22 files scanned, 7 files contains IDs and in total 23 IDs found.
>
> You may have set `org-icalendar-store-UID' somehow.
>

It is set to nil. I have only the *scratch* buffer open, and no other
buffers (although some where open earlier in this emacs session).


> > But my `org-agenda-files` variable only contains 12 files and no
> > #+INCLUDE statements.
>
> ID scanning is not limited to agenda files. Org also scans files known
> to contain ID. E.g., if, during the session, you insert an ID in
> "foo.org", later scans (in the same session) will include "foo.org".
>
> See `org-id-files' (internal variable), and `org-id-extra-files', which
> may contain even more files.
>

`org-id-files` contained a subset of my agenda files plus a few extra
(total: 7 files, and these 7 plus my agenda files do not sum to 22). When I
set it to nil, nothing significant changed, but it was reset after running
`org-icalendar-combine-agenda-files` again.

`org-id-extra-files` was set to org-agenda-text-search-extra-files. When I
set it to nil, nothing significant changed. It does not get reset when
`org-icalendar-combine-agenda-files` is run.

  -k.

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