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[debbugs-tracker] bug#23861: closed (25.1.50; fast-but-imprecise-scrolli


From: GNU bug Tracking System
Subject: [debbugs-tracker] bug#23861: closed (25.1.50; fast-but-imprecise-scrolling: What does "somewhat inaccurate" mean?)
Date: Mon, 14 Oct 2019 12:36:02 +0000

Your message dated Mon, 14 Oct 2019 14:35:25 +0200
with message-id 
<CADwFkm=YuFf8HnNoVrY80nfrNwTqztjYVUJgFuQLuDU0-+6=address@hidden>
and subject line Re: bug#23861: 25.1.50; fast-but-imprecise-scrolling: What 
does "somewhat inaccurate" mean?
has caused the debbugs.gnu.org bug report #23861,
regarding 25.1.50; fast-but-imprecise-scrolling: What does "somewhat 
inaccurate" mean?
to be marked as done.

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23861: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=23861
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--- Begin Message --- Subject: 25.1.50; fast-but-imprecise-scrolling: What does "somewhat inaccurate" mean? Date: Wed, 29 Jun 2016 01:03:00 +1200 User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1
It's unclear to me what the following excerpt from the docstring
for the `fast-but-imprecise-scrolling' variable actually means:

> Note that this optimization can cause the portion of the buffer
> displayed after a scrolling operation to be somewhat inaccurate.

"somewhat inaccurate" is incredibly vague if you don't already
know what it means.

Does it mean that the position scrolled to might be further (or
less far) than it would have been otherwise?

Does it mean that the font-locking may be incomplete or incorrect?

Does it mean that the buffer text may appear corrupted?!

I certainly can't tell what it means. It would be good if that
text was clarified.




--- End Message ---
--- Begin Message --- Subject: Re: bug#23861: 25.1.50; fast-but-imprecise-scrolling: What does "somewhat inaccurate" mean? Date: Mon, 14 Oct 2019 14:35:25 +0200
Eli Zaretskii <address@hidden> writes:

>> From: Phil Sainty <address@hidden>
>> Date: Wed, 29 Jun 2016 01:03:00 +1200
>>
>> It's unclear to me what the following excerpt from the docstring
>> for the `fast-but-imprecise-scrolling' variable actually means:
>>
>>  > Note that this optimization can cause the portion of the buffer
>>  > displayed after a scrolling operation to be somewhat inaccurate.
>>
>> "somewhat inaccurate" is incredibly vague if you don't already
>> know what it means.
>
> It means that what's on the screen might not reflect what's in the
> buffer.
>
> It's hard to tell anything more specific, since which redisplay
> optimizations will be taken in each case depends on many factors on
> which the user has no control.
>
>> Does it mean that the position scrolled to might be further (or
>> less far) than it would have been otherwise?
>
> It could.
>
>> Does it mean that the font-locking may be incomplete or incorrect?
>
> It could.
>
>> Does it mean that the buffer text may appear corrupted?!
>
> It could, if faces change the font size.

That was 3 years ago.  It doesn't look like there is anything more to do
here, so I'm closing this bug report.

Please reopen the bug if that's incorrect.

Best regards,
Stefan Kangas


--- End Message ---

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