[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#40733: 28.0.50; Emacs locks up on paste (yank) of unicode characters
From: |
Pip Cet |
Subject: |
bug#40733: 28.0.50; Emacs locks up on paste (yank) of unicode characters |
Date: |
Mon, 1 Jun 2020 11:44:10 +0000 |
On Mon, Jun 1, 2020 at 11:20 AM Will Bush <will.g.bush@gmail.com> wrote:
> git clone https://github.com/adobe-fonts/adobe-blank.git
> cd adobe-blank
> sudo cp AdobeBlank.ttf /usr/share/fonts/
> fc-cache
> time emacs -Q --eval '(message "︵")' -kill
>
> And it took 4 minutes in the virtual machine!
> Please try it and see if you can repro!
It's taking a while here (pretty standard GNU/Linux x86_64 system),
but something on the order of 20 seconds, not 4 minutes.
in ftcrfont.c:
pat = ftfont_entity_pattern (entity, pixel_size);
FcConfigSubstitute (NULL, pat, FcMatchPattern);
FcDefaultSubstitute (pat);
match = FcFontMatch (NULL, pat, &result); <===========
ftfont_fix_match (pat, match);
This is where it spends so much time. "perf record emacs -Q" suggests
it's a function called FcCharSetSubtractCount. (You might try running
that on your setup, too).