>
> Here more numbers, with this setup:
>
> MSVC8
> Qt 4.1.2 release
> lyx-qt4 release -O2
> AMD XP 1.1Ghz, 100 Mhz Ram
>
^^^^
Where do I get one of those? :)
>
> Page down-key scrolling time of the User's Guide:
>
> 55s
>
> but when I disable all functions of QLPainter
> (just returning immediately) I still get
>
> 25s
>
>
> So optimizing the text drawing functions couldn't
> more than doubling the speed.
>
> Does anybody has an idea why it is still so slow when
> all QLPainter functions are disabled? Is it still
> a Qt4 problem, maybe because of the scrolling, or
> is it a lyx-core "problem".
>
> A profiler would be very useful now, could valgrind
> be used for profiling?
>
Nope, valgrind doesn't help here much. There is a valgrind-tool called
cachegrind, but that doesn't give you what you want since it only tells
you about cache misses. It also doesn't work with MSVC on Windows as far
as I can tell - I believe it is only possible to use with cygwin.
You could try to get a trial version of VTune - buying one is rather
expensive :) Depending whether you go to college or work somewhere you
might get access there.
Check out the external links at
http://en.wikipedia.org/wiki/Profiler_(computer_science) for a list of
possible tools.
Cheers,
Michael
>
> Peter
>
>
>
