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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 listKde-optimize@kde.orghttps://mail.kde.org/mailman/listinfo/kde-optimize
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