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bug#26402: 25.2; Font rendering extremely slow on any non-default font


From: Gennady Uraltsev
Subject: bug#26402: 25.2; Font rendering extremely slow on any non-default font
Date: Sat, 8 Apr 2017 16:54:54 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

Hey,

Nope, sorry. Doesn't seem to help.  What I did:
started emacs with

#emacs -Q lorem-ipsum

emacs opens in fundamental mode with the file (attached)

# M-x eval-expression
# (setq inhibit-compacting-font-caches t)
# buffer-face-set
# variable-pitch

Slow as before. Attaching the profiler logs


On 08/04/17 16:44, Eli Zaretskii wrote:
> > From: Gennady Uraltsev <address@hidden>
> > Date: Sat, 8 Apr 2017 15:48:38 +0200
> >
> > Font rendering in emacs is incredibly slow if any buffer-local change is
> > made i.e. unless using 'default.
>
> Does setting inhibit-compacting-font-caches non-nil solve the problem?
> If it does, can you show an example of a buffer where you see this
> problem?
>

Attachment: BAD-inhibit-cache-buffer-set-face-profile
Description: Text document

Attachment: BAD-inhibit-cache-buffer-set-face
Description: Text document

Attachment: lore-ipsum
Description: Text document


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