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bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses sa
From: |
Eli Zaretskii |
Subject: |
bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator |
Date: |
Mon, 27 Nov 2023 14:10:53 +0200 |
> From: João Távora <joaotavora@gmail.com>
> Date: Sun, 26 Nov 2023 22:02:01 +0000
> Cc: Jonas Bernoulli <jonas@bernoul.li>, 67390@debbugs.gnu.org,
> Adam Porter <adam@alphapapa.net>
>
> On Sun, Nov 26, 2023 at 8:38 PM Joseph Turner <joseph@ushin.org> wrote:
> >
> > João Távora <joaotavora@gmail.com> writes:
> >
> > > On Sat, Nov 25, 2023 at 10:43 PM Joseph Turner <joseph@ushin.org> wrote:
>
> > > So, benchmarking it will have to be, I'm afraid, because AFAIK
> > > font-locking is a very performance sensitive area of Emacs.
> >
> > Yes. I would like to learn how to do this!
>
> I'm CCing Eli.
>
> In the past, ISTR, Eli suggested to benchmark such things by visiting a
> very large file in its beginning, then scrolling down by holding
> the down arrow or PgDn for some fixed time period, like 30 seconds.
> The Emacs that scrolls the farthest is the most performant. Not
> entirely fail-proof (other processes may interfere, etc), but not
> bad either.
I still recommend this method. Something like the below:
(defun scroll-up-benchmark ()
(interactive)
(let ((oldgc gcs-done)
(oldtime (float-time)))
(condition-case nil (while t (scroll-up) (redisplay))
(error (message "GCs: %d Elapsed time: %f seconds"
(- gcs-done oldgc) (- (float-time) oldtime))))))
Evaluate the above, and the invoke it at the beginning of a large
file. Then compare the timings with different font-lock arrangements.
A variant is to scroll by N lines, not by pages. Just change the
above to call scroll-up with the argument of N, for example 1 (or any
other number, if you want).
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, (continued)
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, João Távora, 2023/11/23
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, Jonas Bernoulli, 2023/11/24
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, João Távora, 2023/11/24
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, Joseph Turner, 2023/11/24
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, Jonas Bernoulli, 2023/11/25
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, Joseph Turner, 2023/11/25
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, João Távora, 2023/11/26
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, Joseph Turner, 2023/11/26
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, João Távora, 2023/11/26
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, Joseph Turner, 2023/11/26
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator,
Eli Zaretskii <=
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, João Távora, 2023/11/29
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, Joseph Turner, 2023/11/29
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, João Távora, 2023/11/29
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, João Távora, 2023/11/29
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, João Távora, 2023/11/29
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, João Távora, 2023/11/30
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, Eli Zaretskii, 2023/11/30
- bug#67390: 28; shorthands-font-lock-shorthands assumes shorthand uses same separator, João Távora, 2023/11/30