Version: 3.5.7 (using KDE 3.5.7 "release 79.2" , openSUSE ) Compiler: Target: x86_64-suse-linux OS: Linux (x86_64) release 2.6.18.8-0.5-default stal-dev-lx1:~ # cat /etc/SuSE-release openSUSE 10.2 (X86-64) VERSION = 10.2 stal-dev-lx1:~ # rpm -q kdebase3 kdelibs3 kdebase3-3.5.7-91.1 kdelibs3-3.5.7-79.2 Open the following URL http://www.hardforum.com/showthread.php?t=1145317 and attempt to scroll the page by either using the mouse wheel or by dragging the scrollbar - CPU usage jumps to 100% (my machine has a 3.2 Ghz P4 with 2Gb RAM), the page redraw is very slow, one can see the it being redrawn in rectangles. No problems with Firefox 2 on the same machine.
Cannot reproduce, page scrolls fine in my low end machines: (tested with IBM T20 P3 700Mhz 256MB and opensuse kdelibs3 3.5.7-71, Athlon 700Mhz 400MB and kubuntu feisty). Which video card and driver do you use?
NVIDIA Quadro NVS280 with the latest Nvidia proprietary driver.
Here scrolling is very smooth (using scrollbar), but CPU indeed goes to 100%. Intel CPU 2GHz, intel 950 integrated chipset.
Here scrolling is choppy at first (~7 seconds), taking up 50% CPU, but then becomes smooth with 0% CPU. AMD Sempron 2300+, GeForce 5500 FX, the closed nvidia drivers.
About 50% CPU used while browsing the page, but scrolling is not choppy. (Turion 64, 2*1.6 GHz (at 800 MHz during testing), Konqueror 3.5.9 and 4 (trunk, r798696)).
Works for me as well in both 3.5.9 and 4.0.3. No lag that I can see. I'd recommend closing this. Using Gentoo Linux ~x86 (testing in gentoo lingo). KDE 3.5.9/4.0.3 and the majority of packages compiled using gcc 4.3.0.
Closing