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bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-tra
From: |
Ihor Radchenko |
Subject: |
bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace |
Date: |
Fri, 14 Apr 2023 11:36:09 +0000 |
Eli Zaretskii <eliz@gnu.org> writes:
>> I cannot reproduce.
>> The typing has no noticeable delays.
>
> Your build is optimized, yes? Try building without optimizations, you
> will see quite significant delays just by creating the table.
Sure, but there is no obvious culprit then:
4.01% emacs emacs [.] lookup_char_property
3.04% emacs emacs [.] make_lisp_symbol
3.01% emacs emacs [.] find_interval
2.85% emacs emacs [.] next_interval
2.37% emacs emacs [.] XSYMBOL
2.27% emacs emacs [.] SYMBOLP
2.16% emacs emacs [.] make_lisp_symbol
2.06% emacs emacs [.] make_lisp_symbol
Various functions contribute almost equally with relatively larger (yet,
just 4%) contribution from lookup_char_property called from face_at_pos
(according to the call graph).
I looked into the number of calls to face_at_pos, find_composition, and
handle_display_prop. The number of calls is almost the same. Thus, my
guess is that find_composition is somehow slower than the other two
functions.
Looking int the code, I can see that handle_display_prop does not call
Fnext_single_property_change at all and face_at_pos limits the forward
lookup by TEXT_PROP_DISTANCE_LIMIT. In contrast, compute_stop_pos calls
composition_compute_stop_pos without making use of
TEXT_PROP_DISTANCE_LIMIT (AFAIU) and looks all the way to point-max. (Do
I understand correctly that it implies O(N_intervals^2)??)
> In any case, if you think disabling static composition can be a
> reasonable option for Org Table users (do they use
> prettify-symbols-mode, for example, in the same buffer where they have
> Org tables?), that should be easy.
I'd still prefer to find a better way and leave this workaround as the
last resort.
--
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, (continued)
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Ihor Radchenko, 2023/04/11
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Ihor Radchenko, 2023/04/13
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Eli Zaretskii, 2023/04/13
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Ihor Radchenko, 2023/04/13
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Eli Zaretskii, 2023/04/13
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Ihor Radchenko, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Eli Zaretskii, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace,
Ihor Radchenko <=
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Eli Zaretskii, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Eli Zaretskii, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Ihor Radchenko, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Eli Zaretskii, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Ihor Radchenko, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Eli Zaretskii, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Ihor Radchenko, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Eli Zaretskii, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Ihor Radchenko, 2023/04/14
- bug#62780: 30.0.50; Redisplay gets slow when using Org tables + show-trailing-whitespace, Ihor Radchenko, 2023/04/14