Bug 89430

Summary: konsole:options to speedup scrolling ?
Product: [Applications] konsole Reporter: Thilo Six <T.Six>
Component: generalAssignee: Konsole Developer <konsole-devel>
Status: RESOLVED FIXED    
Severity: wishlist CC: T.Six
Priority: NOR    
Version: 1.4   
Target Milestone: ---   
Platform: unspecified   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Thilo Six 2004-09-13 20:23:25 UTC
Version:           1.4 (using KDE 3.3.0, Gentoo)
Compiler:          gcc version 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)
OS:                Linux (i686) release 2.6.8-gentoo-r3

Hello Kde Team  ;-)

For a while I switched from konsole to Xterm, because Xterm scrolls much faster. I use Gentoo and e.g. if I compile kde ;-) there is a noticeable time effort extra if I do this with konsole, instead of Xterm.

I get used to start Xterm with:
xterm -j -s

from man xterm:
-s
This option indicates that xterm may scroll asynchronously, meaning that the screen does not have to be kept  completely up to date while scrolling. This allows xterm to run faster whennetwork latencies are very high and  is  typically useful when running across a very large internet or many gateways.
-j
This option indicates that xterm should do jump scrolling.  Normally, text is scrolled one line at a time; this  option  allows xterm to move multiple lines at a time so that it does not fall as far behind. Its use is strongly recommended since it makes xterm much faster when scanning through large amounts of text.

Now is something similar also possible with konsole ?
How do I do this ?
I have looked into the documentation, but couldn´t find it there.

Thank you guys for the great work !
No desktop without kde *g*
Comment 1 Harm Hanemaayer 2005-11-17 06:55:19 UTC
I can  confirm this ¨performance bug¨. I think it is a fairly serious bug, since it can slow down your system by 50%.

Processes that print a lot of text output (fast scrolling) overload the CPU, even with a fast graphics card. There should be configuration option for scrolling/text drawing to take less CPU cycles.
Comment 2 Robert Knight 2006-08-08 05:22:04 UTC
Text rendering performance is much improved in Konsole for KDE 4.
Comment 3 shattered 2007-12-25 23:57:46 UTC
Will it be backported to KDE 3?
Comment 4 Robert Knight 2007-12-26 03:48:37 UTC
> Will it be backported to KDE 3? 

I won't be backporting this myself, but patches are accepted.