https://bugs.freedesktop.org/show_bug.cgi?id=66785
Priority: medium
Bug ID: 66785
Assignee: [email protected]
Summary: SVGs rendering too slow over remote X
Severity: major
Classification: Unclassified
OS: Linux (All)
Reporter: [email protected]
Hardware: Other
Status: UNCONFIRMED
Version: 4.1.0.2 rc
Component: graphics stack
Product: LibreOffice
When the new SVG code was merged into LO 4.0, rendering of SVGs is dreadfully
slow over remote X. Impress presentations for instance that have SVG
backgrounds used to take 1 second to open and now take 40 seconds. Any mouse
activity in these slides is horribly slow too. For users of remote X, it's
really not usable.
The old tricks for making LO faster over remote X such as disabling
anti-aliasing and disabling hardware acceleration do not help in this case. No
work around, no way to improve speed. Users are suffering.
Emailed simple SVG to thorsten and he noted:
ugh. That one has ~20 different semi-transparent gradients, each of
them requiring an xserver roundtrip. Stuff like that is fixable in
principle - but please don't hold your breath, it is quite a chunk of
work. Would converting to higher-res png be an option, that gets hit
by the compositing penalty just once instead of 21 times?
Cheers,
-- Thorsten
-------------------------------------------------------------
This can easily be replicated by using two Linux machines and setting your
$DISPLAY to point from one to the other and then running LO. Enterprises using
thin clients are affected by this issue.
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