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List:       kde-optimize
Subject:    Re: normalized signature of signals/slots
From:       Lubos Lunak <l.lunak () suse ! cz>
Date:       2005-11-14 15:02:09
Message-ID: 200511141602.09965.l.lunak () suse ! cz
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On Monday 14 of November 2005 15:40, Olivier Goffart wrote:> Le Lundi 14 Novembre 2005 14:56, Koos \
Vriezen a écrit  :> > On Mon, Nov 14, 2005 at 01:44:14PM +0100, Olivier Goffart wrote:> > > As result i \
obtain> > >> > > normalized: 2469ms> > > usual: 5323ms    ratio: 2.15593> >> > 2.6ms/connect still \
doesn't say much actually, does sound quite slow> > (but maybe you ran it on a 66 MHz ARM CPU :)>> \
5323/(20000*3) = less than 0.1 ms  per connect/disconnect pair> It was on a 1,8Ghz Pentium M>> Yes, it's \
quite few.  that is why i ask if it would be interesting to write> a script that normalize the signature \
of signals in the code.  There's benchmarking for finding out things like that.
> I don't know how many signals/slots are connected at kde start
 static int cnt = 0; qDebug( "CONNECTS: %d", ++cnt );
> , but it > should be much.> is gaining 0.02ms per connection interesting enough ?
 Profiling kwrite startup with sysprof here says about 1-2% is spent in connect() but it's so fast that \
it's reaching samples resolution and as such I wouldn't trust it so much. You might want to try with \
                cachegrind or a slower machine.
-- Lubos LunakKDE developer---------------------------------------------------------------------SuSE CR, \
s.r.o.  e-mail: l.lunak@suse.cz , l.lunak@kde.orgDrahobejlova 27  tel: +420 2 9654 2373190 00 Praha 9   \
fax: +420 2 9654 2374Czech Republic   \
http://www.suse.cz/_______________________________________________Kde-optimize mailing \
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