Sven Hoexter wrote:
On Sat, Dec 29, 2007 at 11:30:17PM +0100, Abdelrazak Younes wrote:
Hi Abdel,
Ahhh! at last a (good) report about the increased speed in 1.5.3! You're
very welcome.
the speed problems are still a very weird problem I can hardly reproduce.
Yesterday it occured again when I started a backport of 1.5.3 for the first
time on a fresh system and today it's gone on the same box.
On my computer at home and my laptop I've been working with full speed and joy
for the last two month.
I've nearly given up on searching for a testcase where it's reproducible now.
Out of curiosity I've taken a look at the bugs filled against LyX in the
Ubuntu launchpad thingy last week and found at least those three describing
the same problem:
Hum, why are those people discussing the bugs there instead of our
bugzilla and/or the mailing lists?
https://bugs.launchpad.net/ubuntu/+source/lyx/+bug/136632
https://bugs.launchpad.net/ubuntu/+source/lyx/+bug/129813
The slowness due to external clipboard has been solved in 1.5.2 IIRC. As
to the scrolling and redraw problem, I am almost certain that it is an
issue with X11 and the Window manager. LyX uses a pixmap (QPixmap) for
the work area drawing and this is handled at the server side under X11;
if for some reason, the pixmap transfer to screen is delayed, LyX will
obviously appear to be very slow. I cannot do much without some
profiling result but I understand at the same time that it's hard to
profile if the slowness is intermittent. I could send out a patch that
uses an image instead of a pixmap for drawing; the difference is that an
image will be processed by the X11 client. This could speedup local
execution of LyX but will be a problem for LyX over the network.
https://bugs.launchpad.net/ubuntu/+source/lyx/+bug/94706
Scrolling will be fixed in 1.6.
Abdel.
