Hello Thomas,
Did I understand properly you are using PAW under Windows?
That should have meant there is no "multi-thread" thread :-) here
because the Windows version of PAW (more precisely the HIGZ package,
ix_higz.dll) uses EXACTLY the same multi-thread schema inherited by ROOT
(not only the schema, the code was adopted as well).
Valeri
> -----Original Message-----
> From: Thomas Nisius [mailto:tnisius@web.de]
> Sent: Thursday, August 14, 2003 12:02 PM
> To: fine@bnl.gov
> Cc: roottalk@pcroot.cern.ch
> Subject: Re: RE: RE: [ROOT] execution speed of compiled programs using
> ROOT
>
> Hi,
>
> Sorry if I missed the point; here is a short description of what I
want to
> do
> I have a program for medical image reconstruction that needs to write
lots
> of histograms and profiles to disk for further analysis. Currently
this
> program uses PAW. Since the data analysis with PAW is not a trivial
task
> for people at clinical sites, we want to change the program to use
root
> and provide an analysis tool. Within this program (the image
> reconstruction) I observed a significant slowdown of all routines even
> those, that are not related to root.
> The example I provided, just showed, that even such simple pieces of
code
> are influenced by root.
>
> Now to my question:
> how can cope with the slowdown that occurs whenever I link against the
> root libs?
>
> Thanks in advance
> Thomas Nisius
>
>
> >Hello Thomas,
> > Could you elaborate what was the in initial cause of your
investigation?
> > For example for sure ROOT needs some time to be initialized since it
> loads dozen the share >libraries (DLL's).
> > To get the right answer one should ask the right question. What
question
> you want to be >answered.
> >I am really reluctant to go deeper at this point. The program you
> prepared (with "constant" >only loop) is no use to do any solid
> conclusion.
> >On other hand I am not keen to start the discussion how such kind of
the
> code should look like >with no solid reason.
>
>
________________________________________________________________________
__
> Die sicherste Form der Kommunikation: E-Mails verschluesseln,
Spam-Filter,
> Adressverifizierung, digitale Unterschrift: http://freemail.web.de
This archive was generated by hypermail 2b29 : Thu Jan 01 2004 - 17:50:14 MET