From kde-optimize  Mon Nov 14 13:56:16 2005
From: Koos Vriezen <koos.vriezen () xs4all ! nl>
Date: Mon, 14 Nov 2005 13:56:16 +0000
To: kde-optimize
Subject: Re: normalized signature of signals/slots
Message-Id: <20051114135616.GD87676 () xs4all ! nl>
X-MARC-Message: https://marc.info/?l=kde-optimize&m=113197658711563

On Mon, Nov 14, 2005 at 01:44:14PM +0100, Olivier Goffart wrote:
> Le Lundi 14 Novembre 2005 13:05, Koos Vriezen a écrit :
> > On Saturday 12 November 2005 11:30, Olivier Goffart wrote:
> > > Hello
> >
> > ...
> >
> > > After some test (attached) I noticed that the normalized signature is
> > > about twice times faster than the not normalized one
> >
> > Can you give some numbers (I tried to compile it but apparently that's
> > not a 'g++ test_signals.cpp -lqt-mt' one ..)
> 
> I used 
> gcc -I/opt/qt4/include/ -I/opt/qt4/include/QtCore/ -L/opt/qt4/lib/ 
> -lQtCore_debug -O2 test_signals.cpp       

Ah qt4, that's not for me yet ..

> 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 :)

Sorry for the noise (the QDateTime header should have showed me).

Koos

> I repeated it several times, the ratio is always between 1.9 and 2.2
> 
> > > (This may i guess be even more in the case of bigger signatures, or class
> > > with more signals and slots)
> >
> > Isn't it a hashtable?
> 
> No, it's all linear
> 



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