'WG: Huge performance problem under Windows'

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List: kde-windows
Subject: WG: Huge performance problem under Windows
From: "Brisset, Nicolas" <Nicolas.Brisset () eurocopter ! com>
Date: 2009-11-13 7:42:13
Message-ID: 5FB77C9EB8044848B6CBFCACE171006305C77D62 () sma2900 ! cr ! eurocopter ! corp
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Hi, 

being an avid KDE user and working in a very Windows-centric
organization, I'm very interested by the potential of KDE (and Qt) tools
running under Windows. One of the projects I'm most actively involved in
(mainly as a tester and bug reporter, though I occasionally contributed
some code as well) is kst, a great (though not so well known)
professional plotting tool.

I've just subscribed to this list to be able to follow progress on the
KDE Windows front, and also to be able to get some advice on kst under
Windows, as version 2.0.0 (due soon) will be the first to run on that
platform. We are currently testing it and there are a few things we are
a bit puzzled at. If anybody could give some advice, we'd be very
grateful.

The 2 biggest problems we have so far are a memleak (I'll send another
message with information on that one) and a performance problem detailed
in the message below, which I am forwarding as it seems it did not make
it to the list. 

You can find kst code under
https://[user]@svn.kde.org/home/kde/branches/work/kst/portto4/kst
<https://%5buser%5d@svn.kde.org/home/kde/branches/work/kst/portto4/kst>
(of course also available with anonymous svn, though not from behind a
proxy...), as far as I know it currently requires any Qt 4 version (not
necessarily the latest).

Kst 1.x was a KDE application, but kst 2.x is so far pure Qt (.pro
based), though an optional KDE integration is planned down the road. I
hope that still qualifies it to be discussed on this list :-)

Don't hesitate to ask for more information if needed, 

Best regards,

Nicolas

________________________________

Von: Brisset, Nicolas 
Gesendet: Donnerstag, 12. November 2009 17:11
An: 'kst@kde.org'; 'kde-windows@kde.org'
Betreff: Huge performance problem under Windows

Hi, 

I had used kst windows so far on fairly small files. I had the
impression it was slower than the Linux version but it was only
subjective. I tried to load gyrodata.dat from the SVN repos today to
show off the performance to a colleague. Well, it turns out it was a bad
idea :-(: it takes *ages* to load (I'm talking about minutes here, don't
discourage it will eventually appear !). I have no idea where the
difference comes from, loading the same file under Linux with the same
version (svn HEAD) is *instantaneous*.

Maybe the KDE-Windows folks could help there? There must be a stupid
reason. I tried the kst 2.0.0 beta from the website (I believe it was
compiled with VC++) and todays's SVN compiled qith Qt SDK (Creator)
2009.02. This is to me a blocking point for widespread use on Windows...

Nicolas 

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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi, <o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

being an avid KDE user
and working in a very Windows-centric organization, I'm very interested by the
potential of KDE (and Qt) tools running under Windows. One of the projects I'm
most actively involved in (mainly as a tester and bug reporter, though I occasionally
contributed some code as well) is kst, a great (though not so well known) \
professional plotting tool.<o:p></o:p>

I've just subscribed to
this list to be able to follow progress on the KDE Windows front, and also to
be able to get some advice on kst under Windows, as version 2.0.0 (due soon)
will be the first to run on that platform. We are currently testing it and
there are a few things we are a bit puzzled at. If anybody could give some
advice, we'd be very grateful.<o:p></o:p>

The 2 biggest problems we
have so far are a memleak (I'll send another message with information on that
one) and a performance problem detailed in the message below, which I am
forwarding as it seems it did not make it to the list. <o:p></o:p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>You can find kst code
under <a
href="https://%5buser%5d@svn.kde.org/home/kde/branches/work/kst/portto4/kst">https://[user]@svn.kde.org/home/kde/branches/work/kst/portto4/kst</a>
 (of course also available with anonymous svn, though not from behind a \
proxy&#8230;), as far as I know it currently requires any Qt 4 version (not \
necessarily the latest).<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

Kst 1.x was a KDE
application, but kst 2.x is so far pure Qt (.pro based), though an optional KDE
integration is planned down the road. I hope that still qualifies it to be discussed
on this list J<o:p></o:p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Don't hesitate to ask for
more information if needed, <o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Best \
regards,<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Nicolas<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

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<hr size=2 width="100%" align=center tabindex=-1>

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Von: Brisset, Nicolas
 
Gesendet: Donnerstag, 12. November
2009 17:11 
An: 'kst@kde.org';
'kde-windows@kde.org' 
Betreff: Huge performance problem
under Windows<o:p></o:p>

</div>

<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi, <o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

I had used kst windows so far on fairly small files.
I had the impression it was slower than the Linux version but it was only
subjective. I tried to load gyrodata.dat from the SVN repos today to show off
the performance to a colleague. Well, it turns out it was a bad idea \
L: it takes \
*ages* to load (I'm talking about \
minutes here, don't discourage it will eventually appear !). I have no idea where the
difference comes from, loading the same file under Linux with the same version
(svn HEAD) is *instantaneous*.<o:p></o:p>

Maybe the KDE-Windows folks could help there? There
must be a stupid reason. I tried the kst 2.0.0 beta from the website (I believe
it was compiled with VC++) and todays's SVN compiled qith Qt SDK (Creator)
2009.02. This is to me a blocking point for widespread use on \
Windows&#8230;<o:p></o:p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<div>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Nicolas </span></font><font size=2 face=Arial><span
lang=FR style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>

</div>

<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=FR
style='font-size:12.0pt'><o:p>&nbsp;</o:p></span></font></p>

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