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From: | Gregory Heytings |
Subject: | bug#56682: Fix the long lines font locking related slowdowns |
Date: | Sun, 07 Aug 2022 00:29:05 +0000 |
The problems with C-n/C-p were unrelated, and seem to be a very old bug. I've now mostly fixed that on master (and hopefully didn't introduce any regressions while at that).
Thanks! Indeed these problem seem fixed now, it's much better. I did not see any regressions, if I see anything I'll tell you. One case that still isn't quite right apparently is the arabic-small.txt.json file. If I open that file with emacs -Q and type C-f, or C-n, or C-p, point moves to EOB (but strangly, not in 100% cases), and there C-a, or M-<, or C-p, or C-n do not seem to work anymore.
In general, layout calculations when we have very long stretches of R2L text in a left-to-right paragraph are very tricky, because many assumptions become false.
Frankly, would programming be as fun as it is if assumptions were true? 😉
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