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bug#26333: 26.0.50; Hang when displaying some special characters for the
From: |
Steven Allen |
Subject: |
bug#26333: 26.0.50; Hang when displaying some special characters for the first time |
Date: |
Sun, 02 Apr 2017 10:14:00 -0700 |
Eli Zaretskii <eliz@gnu.org> writes:
> Is this the only thing one has to do, in "emacs -Q", in order to
> reproduce the problem with these fonts? Or do you have other
> font-related customizations on your init files?
That's the only thing I have to do. Evaluate that, paste the character
in question, and then wait.
Eli Zaretskii <eliz@gnu.org> writes:
> I meant "normal" as in "Emacs is known to do that sometimes when
> searching for a font".
Emacs is also known to sometimes crash. That doesn't make this behavior
"normal". I'd understand "expected behavior" but I'd disagree (15
seconds is a *really* long time to hang just to lookup a font).
Eli Zaretskii <eliz@gnu.org> writes:
> I'm not sure comparison with other applications is valid, as Emacs
> attempts to solve a more complex problem, and its font-searching
> algorithms are biased in favor of finding fonts which support scripts
> and languages, not symbols.
How are those any different? From a computer's perspective, they're all
just Unicode blocks.
Regardless, if this is the case, one could solve this problem by simply
stacking the algorithms: execute the normal (fast) search first and
fallback on Emacs' complex (slow) search.
However, I kind of doubt this is a fundamental limitation in the current
font search algorithm.
Eli Zaretskii <eliz@gnu.org> writes:
> Is it eventually displayed using Symbola or some other font?
Symbola. However, when the default font is DejaVu, it's displayed with
"DejaVu Math TeX Gyre" (a different font in a different file).