[bt-devel] 1.1 issues

[Luke Mauldin]

I have done some testing myself over the past few hours, and I have a 1.33 
Ghz Athlon with 256 MB of DDRAM so it is a bit hard to tell exactly where I 
need to work on since everything is pretty fast  :)  I did do some profiling 
though and I found that most of the time is spent in Qt3 and its functions.  
Qt3::QTextFormatterBreakWords::format takes up 20.690% of execuation time, 
Qt3::QTextString::width takes up 12.070%, Qt3::QTextParag::paint takes up 
10.340%, and in all Qt3 functions take up over 75% of runtime.  They are 
called MANY times.  Qt3::QTextString::width is called 972284 times!  Many 
other Qt3 functions are called 3000-4000 times.  Where did the Qt3 "stuff" 
come from?  Did it come from actual Qt3 betas?  I know there was a new beta 
released recently, if the stuff in bibletime came from an eariler Qt3 beta, 
maybe we could "update" the bibletime version to a later version of the Qt3 
beta?  Also, do we really need to be calling those functions THAT many times? 
 I was only in bibletime for about 10 min.  In several of those functions I 
saw that pointers were used excessively, and while pointers can be good 
things, they CAN majorly restrict the compiler's optimiaztion because 
sometimes the compiler has a difficult time determining what the pointer is 
pointing to and optimizating the code.

Luke

On Wednesday 04 July 2001 12:08 pm, you wrote:
> Yes, I will try to do this.  If anyone has any speific areas they would
> like me to test, let me know.
>
> Luke
>
> On Wednesday 04 July 2001 03:11 am, you wrote:
> > Yesterday I played around with the new cool unicode
> > modules by Chris. I downloaded and installed code2000.
> >
> > Before starting BT, X consumed 23MB.
> > Then I started BT, set the displayer font to code2000,
> > and opened just a normal english module.
> > Then X was blocking for quite a while (apparently loading
> > code2000), very annouing. Then BT consumed 19MB and X
> > consumed around 86MB!!! This is too much and too slow for me ;(
> > After closing BT, things were back normal again.
> >
> > Is this an X or QT related problem? Will QT3 bring speedups in
> > this area? Or should I use another font? Any help appreciated...
> >
> > A task for volunteers:
> > We need somebody to profile BT and discover cpu consuming bugs /
> > inefficient code. It's easy:
> > 1) do make clean; configure --enable-profile --enable-debug; make
> > 2)run BT and just USE it. This is a good time to find bugs and make
> >   feature requests.
> > 3)while running, BT will create the file gmon.out in the working dir.
> >   Use KProf to analyse it.
> >
> > Somebody want to take up this task?
> >
> > Martin
>
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