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bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements
From: |
Ihor Radchenko |
Subject: |
bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling) |
Date: |
Sun, 14 Aug 2022 23:55:46 +0800 |
I am experiencing severe performance degradation on current master.
The degradation happens when working with Org files and I managed to
bisect the cause down to
e7b5912b235936b304701ba6b1e808d9b197fd4f is the first bad commit
commit e7b5912b235936b304701ba6b1e808d9b197fd4f
Author: Gregory Heytings <gregory@heytings.org>
Date: Sat Jul 16 19:06:38 2022 +0000
Improvements to long lines handling.
* src/buffer.h (struct buffer): New field 'long_line_optimizations_p'.
* src/buffer.c (syms_of_buffer): New variable 'long-line-threshold'.
(reset_buffer): Initialize the 'long_line_optimizations_p' field.
(Fbuffer_swap_text): Handle it.
...
I tried M-x profiler to find the cause, but the 3-4 second hangs are not
reflected in the profiler report.
debug-on-entry + manual stepping through the function revealed that the
hang happens when calling jit-lock-fontify-now.
I was able to trigger the slowdown when unfolding headlines hidden using
'invisible text property.
Do you have any idea what could be going wrong or how to debug things further?
--
Ihor Radchenko,
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#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling),
Ihor Radchenko <=
- bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling), Gregory Heytings, 2022/08/14
- bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling), Gregory Heytings, 2022/08/16
- bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling), Eli Zaretskii, 2022/08/16
- bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling), Ihor Radchenko, 2022/08/16
- bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling), Gregory Heytings, 2022/08/16