From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: Re: Speeding up agenda custom command with org-agenda-earlier &
 org-agenda-later
Date: Fri, 22 Jun 2018 22:49:23 +0200
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	(Zongheng Yang's message of "Wed, 20 Jun 2018 15:24:42 -0700")
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To: Zongheng Yang <zongheng.y@gmail.com>
Cc: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>

Hello,

Zongheng Yang <zongheng.y@gmail.com> writes:

> Here's an agenda custom command that acts as the main interface I interact
> with org (in fact, emacs :)).
>
>   (setq org-agenda-custom-commands
>         '(("c" "Simple agenda view"
>            ((agenda "")
>             (tags "PRIORITY=\"A\""
>                   ((org-agenda-files '("~/org/work.org" "~/org/ideas.org"))
>                    (org-agenda-skip-function '(org-agenda-skip-entry-if
> 'todo 'done))
>                    (org-agenda-overriding-header "High-priority tasks:")
>                    ))
>             (tags-todo "PRIORITY=\"C\""
>                        ((org-agenda-files '("~/org/work.org" "~/org/
> ideas.org"))
>                         (org-agenda-overriding-header "Long-term:")))
>             (alltodo ""
>                      ((org-agenda-skip-function
>                        '(or (zongheng-org-skip-subtree-if-priority ?A)
>                             (zongheng-org-skip-subtree-if-priority ?C)
>                             (org-agenda-skip-if nil '(scheduled deadline))))
>                       (org-agenda-overriding-header "Other tasks:")))
>             ))))
>
> After I get into this view, I frequently issue many "org-agenda-earlier" &
> "org-agenda-later" commands, often in a back-and-forth fashion, to inspect
> what I've done around certain periods.
>
> In such a use case, it seems there's *no reason to not cache results*.
> Without such caching currently *the latency of switching is really high*;
> with such a caching, I'm happy to pay an one-time latency/CPU cost for the
> first command, as long as successive commands can be sped up.
>
> Is a feature like this planned?

I don't think is it planned. Feel free to implement it, if you want to.

I consider Org agenda in dire need of rewriting, though. for better
scalability and easier maintenance.

Regards,

-- 
Nicolas Goaziou