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bug#42267: Fontification takes a long time when an equation contains a d
From: |
Ikumi Keita |
Subject: |
bug#42267: Fontification takes a long time when an equation contains a double prime |
Date: |
Fri, 10 Jul 2020 16:53:39 +0900 |
Hi Najib and all,
>>>>> Najib Idrissi-Kaïtouni <najib.idrissi.kaitouni@gmail.com> writes:
> Yes, this is much, much better with this patch. I don't experience any
> noticeable slowdown anymore, whether in the test file or in my "real
> world" file. Thanks!
Thanks for confirmation. We'll fix the problem soon.
To AUCTeX developers:
I propose to install the attached fix. Any comments and suggestions are
welcome.
[Analysis]
The backgrounds of the problem are the following two:
1. When there is a closing quote (or double prime) '' without matching
opening quote `` before it, current
`font-latex-extend-region-backwards-quotation' ends up to decrease
`font-lock-beg' by 5000 (=default value of
`font-latex-multiline-boundary') and returns t.
2. Previously, font-latex-extend-region-backwards-* functions were
stored in `font-latex-extend-region-functions' and called just once
per fontify operation. However, now they are in
`font-lock-extend-region-functions' and can be called repeatedly in
`font-lock-default-fontify-region', until all of them return nil.
Therefore, when there is math expression like $f''(x)=x^{3}$, current
f-l-e-r-b-q repeatedly decreases `font-lock-beg' so that the font lock
region begins with BOB eventually. Thus every key stroke forces to
re-fontify all the region from top of the buffer. This is the reason of
the apparent slowdown in a large buffer.
I think the behavior of the above item 1 is a bug. When f-l-e-r-b-q
cannot find a matching opening quote, it should just give up to extend
the region anymore.
Regards,
Ikumi Keita
0001-Don-t-extend-font-lock-region-too-much-bug-42267.patch
Description: candidate patch
- bug#42267: Fontification takes a long time when an equation contains a double prime, Najib Idrissi-Kaïtouni, 2020/07/08
- bug#42267: Fontification takes a long time when an equation contains a double prime, Arash Esbati, 2020/07/08
- bug#42267: Fontification takes a long time when an equation contains a double prime, Najib Idrissi, 2020/07/09
- bug#42267: Fontification takes a long time when an equation contains a double prime, Ikumi Keita, 2020/07/09
- bug#42267: Fontification takes a long time when an equation contains a double prime, Najib Idrissi-Kaïtouni, 2020/07/09
- bug#42267: Fontification takes a long time when an equation contains a double prime,
Ikumi Keita <=
- bug#42267: Fontification takes a long time when an equation contains a double prime, Ikumi Keita, 2020/07/11
- bug#42267: Fontification takes a long time when an equation contains a double prime, PierGianLuca Porta Mana, 2020/07/11
- bug#42267: Fontification takes a long time when an equation contains a double prime, Ikumi Keita, 2020/07/11
- bug#42267: Fontification takes a long time when an equation contains a double prime, PierGianLuca Porta Mana, 2020/07/11