Bug 153519 - scrolling clipped items consumes excessive cpu
Summary: scrolling clipped items consumes excessive cpu
Status: RESOLVED NOT A BUG
Alias: None
Product: plasma4
Classification: Plasma
Component: general (show other bugs)
Version: unspecified
Platform: Compiled Sources Linux
: NOR normal
Target Milestone: ---
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2007-12-05 21:37 UTC by Oliver Becker
Modified: 2007-12-19 06:49 UTC (History)
0 users

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Description Oliver Becker 2007-12-05 21:37:41 UTC
Version:            (using KDE Devel)
Installed from:    Compiled sources
Compiler:          gcc version 4.1.1 (Gentoo 4.1.1-r3) 
OS:                Linux

The newsticker applet is extremely slowing down my system. When I am not running it my load average is at about 1-2 % but with this one open it goes up to more than 20 % (running on an intel dual core with 3 Ghz). And because I think the engine is the reason for the slowness (the scrolling text in detail) i'm submitting it here.
Comment 1 Aaron J. Seigo 2007-12-05 21:43:09 UTC
this is because QGraphicsView's clipping mechanisms in 4.3 are horrible. this is a known issue upstream.

we also have the ability, finally, to simple scroll() item content with 4.4, something we don't have in 4.3.

in any case, this is a known issue but not something plasma itself can fix. it should magically go away in kde 4.1, however.
Comment 2 Aaron J. Seigo 2007-12-19 06:49:01 UTC
this is an upstream issue, nothing that we can do about it. i'm not going to keep upstream issues that have been reported alive here. 

i wish there was an 'upstreamed' resolution option (bugzilla is so tuned for non-open source software development it's hardly funny)