From: Eli Zaretskii <eliz@gnu.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: acm@muc.de, emacs-devel@gnu.org
Subject: Re: bug-reference-prog-mode slows down CC Mode's scrolling by ~7%
Date: Sat, 04 Sep 2021 19:12:51 +0300 [thread overview]
Message-ID: <83y28cuxoc.fsf@gnu.org> (raw)
In-Reply-To: <jwv1r64ic7b.fsf-monnier+emacs@gnu.org> (message from Stefan Monnier on Sat, 04 Sep 2021 11:55:08 -0400)
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: acm@muc.de, emacs-devel@gnu.org
> Date: Sat, 04 Sep 2021 11:55:08 -0400
>
> >> But my understanding of what you're saying is that you don't consider
> >> "how `jit-lock-bounds` are used" to be an internal detail. Instead you
> >> consider these to be part of the "protocol" that the writer of client
> >> functions needs to know in order for those functions to work correctly.
> >> And I can't understand why you'd think that. I think even in the
> >> current situation, none of what we have discussed has prompted a need or
> >> desire to change client functions: they're oblivious to the change
> >> being discussed.
> > We have the reason right before our eyes: what Alan needs to do. If
> > these details are not important, why does he work on changing them?
>
> His change is not to font-lock but to jit-lock. So it's consistent with
> my claim that it's a matter that's internal to jit-lock.
>
> >> If so, could you give some kind of scenario where that could happen?
> > Why do I need to come up with a scenario, when it's clear as a day
> > that programming blindly to an insufficiently documented interface is
> > asking for trouble?
>
> But the change under consideration does not affect the documentation of
> the API exposed to client functions, AFAICT. I'm not asking the author
> to program blindly. I just can't see any reason to specify any more
> precisely than saying that BEG...END can be any valid region in the
> buffer and that the function can use `jit-lock-bounds` to inform
> jit-lock of the region actually handled, where this `jit-lock-bounds`
> needs to cover BEG...END but is otherwise optional and only used for
> optimization purposes.
>
> [ This is largely consistent with what you wrote in the docstring, so
> it seems we agree on this part. ]
>
> The precise way in which jit-lock uses this info for optimization
> purposes is something that may change (and hence should not be part of
> the contract/documentation) as evidenced by the fact that Alan already
> has 2 proposed patches that change it in different ways, and I myself
> described yet another possible way it could be used.
Let's agree to disagree about this, okay?
next prev parent reply other threads:[~2021-09-04 16:12 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-01 17:33 bug-reference-prog-mode slows down CC Mode's scrolling by ~7% Alan Mackenzie
2021-09-01 17:44 ` Eli Zaretskii
2021-09-01 17:55 ` Alan Mackenzie
2021-09-01 18:01 ` Eli Zaretskii
2021-09-01 18:20 ` Alan Mackenzie
2021-09-01 18:28 ` Eli Zaretskii
2021-09-01 19:19 ` Alan Mackenzie
2021-09-01 20:59 ` Stefan Monnier
2021-09-02 6:26 ` Eli Zaretskii
2021-09-02 16:57 ` Alan Mackenzie
2021-09-02 18:46 ` Stefan Monnier
2021-09-02 19:24 ` Alan Mackenzie
2021-09-02 21:08 ` Alan Mackenzie
2021-09-03 6:16 ` Eli Zaretskii
2021-09-03 12:30 ` Stefan Monnier
2021-09-03 12:38 ` Eli Zaretskii
2021-09-03 22:25 ` Stefan Monnier
2021-09-04 6:13 ` Eli Zaretskii
2021-09-04 13:36 ` Stefan Monnier
2021-09-04 13:55 ` Eli Zaretskii
2021-09-04 14:44 ` Stefan Monnier
2021-09-04 14:56 ` Eli Zaretskii
2021-09-04 15:55 ` Stefan Monnier
2021-09-04 16:12 ` Eli Zaretskii [this message]
2021-09-04 16:24 ` Stefan Monnier
2021-09-04 16:28 ` Eli Zaretskii
2021-09-04 16:40 ` Stefan Monnier
2021-09-03 6:10 ` Eli Zaretskii
2021-09-03 10:47 ` Alan Mackenzie
2021-09-03 11:24 ` Eli Zaretskii
2021-09-03 16:15 ` Alan Mackenzie
2021-09-03 12:27 ` Stefan Monnier
2021-09-03 12:19 ` Stefan Monnier
2021-09-03 12:35 ` Eli Zaretskii
2021-09-03 16:52 ` Alan Mackenzie
2021-09-03 20:51 ` Alan Mackenzie
2021-09-04 6:09 ` Eli Zaretskii
2021-09-04 14:50 ` Alan Mackenzie
2021-09-04 15:00 ` Stefan Monnier
2021-09-04 15:32 ` Alan Mackenzie
2021-09-04 15:36 ` Eli Zaretskii
2021-09-04 15:43 ` Alan Mackenzie
2021-09-04 15:48 ` Eli Zaretskii
2021-09-04 16:05 ` Alan Mackenzie
2021-09-04 16:15 ` Eli Zaretskii
2021-09-06 10:46 ` Alan Mackenzie
2021-09-06 11:10 ` Eli Zaretskii
2021-09-06 19:08 ` Alan Mackenzie
2021-09-06 19:23 ` Eli Zaretskii
2021-09-18 11:37 ` Alan Mackenzie
2021-09-18 11:59 ` Eli Zaretskii
2021-09-06 21:59 ` andrés ramírez
2021-09-07 19:47 ` Alan Mackenzie
2021-09-07 17:57 ` andrés ramírez
2021-09-06 13:24 ` Stefan Monnier
2021-09-04 16:06 ` Stefan Monnier
2021-09-04 16:23 ` Eli Zaretskii
2021-09-04 16:39 ` Stefan Monnier
2021-09-04 17:19 ` Eli Zaretskii
2021-09-04 17:47 ` Stefan Monnier
2021-09-04 18:10 ` Eli Zaretskii
2021-09-04 18:40 ` Stefan Monnier
2021-09-11 12:49 ` Eli Zaretskii
2021-09-11 17:04 ` Stefan Monnier
2021-09-11 17:17 ` Eli Zaretskii
2021-09-11 18:00 ` Stefan Monnier
2021-09-11 18:16 ` Eli Zaretskii
2021-09-11 19:55 ` Stefan Monnier
2021-09-12 3:51 ` Eli Zaretskii
2021-09-12 16:41 ` Stefan Monnier
2021-09-12 16:53 ` Eli Zaretskii
2021-09-12 17:41 ` Stefan Monnier
2021-09-12 17:55 ` Eli Zaretskii
2021-09-12 21:11 ` Stefan Monnier
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