[Libreoffice-bugs] [Bug 131740] TrueType fonts with Chinese slow down LibreOffice

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=131740

--- Comment #2 from Ming Hua <ming.v.hua at qq.com> ---
As I've said in bug 130949 (comment #2 and #8 there), this is a wildly reported
problem, but never properly diagnosed, because it depends a lot on the user's
font configuration.

Your problem most likely doesn't stem from the "OpenSans" font you specified -
since I doubt it covers any Chinese glyphs - but instead from whatever the
fallback font on your KUbuntu system.  Unfortunately, I don't know any easy way
to identify this fallback font in LO.

The workaround is to specify a font that's known good for displaying Chinese
characters, like "Noto Sans CJK HK" in your second file.  You can always
specify separate fonts for Latin and Chinese text if you prefer OpenSans for
its Latin and digital glyphs.

FWIW, on my Windows 10 system with LO 6.4.3, I can open both attached files
without any slowdown.  I have neither "OpenSans" or "Noto Sans CJK HK" fonts
installed (I have "Source Han Sans SC" instead).

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