Version: Recent CVS from KDE_3_1_BRANCH (using KDE KDE 3.1.3) Installed from: Compiled From Sources Compiler: gcc version 3.3.1 20030626 (Debian prerelease) OS: Linux When selecting text in the Konqueror web browser, XFree86 can use a large amount of CPU time. To reproduce. Open konqueror, and go to a web page (eg http://slashdot.org) open xterm, so that you can see the xterm and some part of the konqueror window which contains text, and run top. Hold down the left mouse button and wiggle the mouse around so that text is selected. Keep the mouse moving and do not release the left mouse button. Top will show that X is using at least 80% of CPU time. I can reproduce this on my laptop 333MHz, XFree 4.2 with neomagic graphics and on my desktop 1.2GHz, XFree 4.3 and Radeon 9100 graphics. I'm using fontconfig anti-aliased text on both. Expected behaviour is that this causes very little load on the system. Perhaps all that is needed is to require a short delay between selection area redraws?
My system generates a 30% load by X, using approximately 50% of the CPU altogether (I have lots of other programs running). I'm using Konqueror from CVS HEAD, along with XFree86 4.3.0, anti-aliased fonts. It's an Athlon 1.4 GHz.
Using Konqueror from KDE 3.1.3, Xfree 4.3.0, playing with selection makes XFree to take 70-80% of the CPU, kdeinit taking between 15 and 20%. The figures are similars on an Athlon 850 and a P4 1GHz. Fonts are anti-aliased.
I can confirm the raised load, but I don't consider it really important. After all it doesn't take away functionality
*** This bug has been marked as a duplicate of 55941 ***
#55941 is reported as fixed in 3.2.1, but I can still reproduce this.
I can confirm on 3.5.2 on amd64 3200+ that holding down mouse button and moving it around on slashdot as described above, I was able to get X to a maximum of 80% CPU usage and konqueror to a maximum of 22%, obviously not simultaneously. No loss in responsiveness or lag or anything bad apart from the high load statistic is experienced.
RESOLVED NOTAREALPROBLEM
On Sunday 27 August 2006 02:55, Lubos Lunak wrote: > RESOLVED NOTAREALPROBLEM It really is a problem and it's not minor. You won't believe how irritating it is not being able to select text. But I did see a commit regarding that at some point in the 3.5 branch so will test that and see.
"When selecting text in the Konqueror web browser, XFree86 can use a large amount of CPU time." - the bugreport is not about being able to select text, the bugreport is about it needing some CPU activity, which is to be expected.