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[Emacs-diffs] emacs-25 0be6725 1/2: Document problem: slow screen refres
From: |
Vincent Belaïche |
Subject: |
[Emacs-diffs] emacs-25 0be6725 1/2: Document problem: slow screen refresh on missing font. |
Date: |
Wed, 25 May 2016 21:44:40 +0000 (UTC) |
branch: emacs-25
commit 0be672542ad60e6c73d36b7fdc1b6786786595ad
Author: Vincent Belaïche <address@hidden>
Commit: Vincent Belaïche <address@hidden>
Document problem: slow screen refresh on missing font.
See discussion of bug#22519 for more on this.
---
etc/PROBLEMS | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index 31f38e3..84d39a4 100644
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -749,6 +749,20 @@ the following variables: tex-font-script-display (how much
to
lower/raise); tex-suscript-height-ratio (how much smaller than
normal); tex-suscript-height-minimum (minimum height).
+** Screen refresh is slow when there are special characters for which no
suitable font is available
+
+If the display is too slow in refreshing when you scroll to a new
+region, or when you edit the buffer, it might be due to the fact that
+some characters cannot be displayed in the default font, and Emacs is
+spending too much time in looking for a suitable font to display them.
+
+You can suspect this if you have several characters that are displayed
+as small rectangles containing a hexadecimal code inside.
+
+The solution is to install the appropriate fonts on your machine. For
+instance if you are editing a text with a lot of math symbols, then
+installing a font like 'Symbola' should solve this problem.
+
* Internationalization problems
** M-{ does not work on a Spanish PC keyboard.
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