On Tuesday 06 January 2009 17:44:14 Kishore wrote: > On Tuesday 06 Jan 2009 10:38:51 pm David Carlos Manuelda wrote: > > On Monday 05 January 2009 19:23:39 Nikos Chantziaras wrote: > > > Rex Dieter wrote: > > > > David Carlos Manuelda wrote: > > > >> For example, since I click the K button to raise menu until the menu > > > >> is raised, it is a second or two. The same when running dolphin and > > > >> clicking in folders for example. I don't note this too much while > > > >> running them inside a 3.5.10. > > > > > > > > I've never seen such operations take more than an instant, regardless > > > > of which DE is in use. > > > > > > > > I would venture there's a different explanation other than the > > > > general "kde4 is slower". > > > > > > This happens if compositing is enabled and a binary-only, proprietary > > > NVidia or ATI driver is used or if EXA acceleration is not enabled (in > > > the case of open source drivers; the proprietary ones don't support > > > EXA.) > > > > > > > I had compositing disabled, yet using the binary drivers from nvidia so > > maybe is EXA related, but is strange, as I said, this does not happens > > while running 3.5.10. That's why I asked, because with same X config I > > note the impact of performance running the whole kde 4.1.3 over running > > same apps inside 3.5.10. > > Then, I'll try to set up my X using the VESA driver and retry. > > As it seems... it does matter. Apparently, KDE4 tends to take full > advantage of some underlying features which were barely used before. This > supposedly has exposed new bugs in the underlying stuff. This likely does > not answer your specific question but was just to give you an idea. In fact NVidia had to release a new driver for just that reason. KDE4 was using features that had been in the driver for quite a while, but were never used. KDE4 exposed a major weakness that cause unbearably slow performance with some NVidia cards. NVidia acknowledged the problem and tackled it. I suspect we are going to be reaping this sort of problem for a while, until all the vendors have come to terms with the new requirements. The good news, though, is that Nikos' solution does seem to be working for me. Anne Anne
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