Binary package hint: gnome-terminal
(Ubuntu9.10 using nvidia accelerated drivers)
When editing a text file in vim, I noticed that scrolling up and down is slow & jerky (i.e. can't keep up with key-repeat speed, does 3-4 updates per second jumping several lines on every update). "top" tells me that no other application is using significant cpu-time. "konsole" on the same system has no problems keeping up with the key-repeat speed on cursor up/down.
I tested running
time seq -f 'teeeeeeeeeeeeeeeeeeeeeeeeeeeeeest %g' 1000000
in both konsole and gnome-terminal with as equal settings as possible:
* ran in the same gnome-session
* same window size
* same font
* anti-aliased text enabled
* same amount of scrollback
and konsole is about 8 times faster. A web search indicates that slowness in gnome-terminal has been noticed for several years, so I want to make sure this is reported to the proper place.
ProblemType: Bug
Architecture: i386
Date: Sat Dec 19 20:04:41 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/gnome-terminal
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.2)
NonfreeKernelModules: nvidia
Package: gnome-terminal 2.28.1-0ubuntu1
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcVersionSignature: Ubuntu 2.6.31-16.53-generic
SourcePackage: gnome-terminal
Uname: Linux 2.6.31-16-generic i686
Rendering issues are more likely to be a VTE issue rather than gnome-terminal. Do you see the same issue in xfce4-terminal?