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| From: | Gregory Heytings |
| Subject: | bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling) |
| Date: | Sat, 20 Aug 2022 17:14:35 +0000 |
(progn
(pop-to-buffer "foo.txt")
(flyspell-mode)
(insert (propertize (make-string 20000 ?x) 'display "foo")
"\n\n"))
Then type "d". [Narrow] is shown in the mode line.
I can reproduce that, too. The "Narrow" indication disappears with the next redisplay cycle, so it seems to be a not-too-grave issue (but a bug nonetheless).
It could probably be solved by moving the calculation of "BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)" from decode_mode_spec to mark_window_display_accurate_1, which would set a one-bit field in struct buffer.
WDYT?
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