registry team mailing list archive

[veldt <655024@xxxxxxxxxxxxxxxxxx>]

warning, may contain wishes :)

I've done more tests with transmission-gtk and all torrents paused. The
content of the transmission-gtk window is visually static, with no
pixels changing. No other window partially obscures it and the mouse
pointer is not moving; there should be no cause to redraw anything.
torrent_cell_renderer_render() does a render_compact/_full() 3.31
times/sec. Not much, but these are inactive, unchanging things and do
not need continual rerendering. Since the rerendering is slow, it
becomes not merely "unnecessary", but "crippling". This would be a gtk+
or compiz window-manager issue, I think, although it may also be
perfectionism; on fast modern hardware with complex gui's, can one
really blame a window manager or gui-toolkit for updating something only
every 1/3 of a second? Sigh.

Having said that, if I swish the mouse pointer around on top of the
paused torrents (not clicking), render_compact/_full() is called twice
as often -- 6.79 times/sec, and my cpu usage doubles.

I can understand the window manager saying, "Look out, there is user
activity", but with modern GUI's, why bother redrawing the stuff under
the mouse if there is no "glowing" of items the mouse comes near, nor
"hover" reactions of any kind?

I guess that's two wishes: don't redraw *even a little bit* if it's not
necessary, and, don't repaint under the mouse if you're not reacting to
it.

-- 
Using higher cpu usage
https://bugs.launchpad.net/bugs/655024
You received this bug notification because you are a member of Registry
Administrators, which is the registrant for libcairo.