[Qt-interest] win32-g++ compiled Qt app much bigger than win32-msvc compiled one?

[Sven Grunewaldt]

You have to remember that UPX will extract the whole thing back into the 
system ram, so the compressed exe will use _at least_ 10,305 MB of ram.
I played with this when I programmed with PyQt and concluded that I 
don't want to fill the Ram with this stuff in the years of 250GB to 
1.5TB HDDs.

Also I still suggest to try "strip *.exe" as this can reduce the file 
size a lot.

Regards,
Sven Grunewaldt

Am 31.03.2009 11:15, schrieb James Yan:
> anyway, i would like to say : UPX rocks! :D
>
> Visual C++ Express 2008 (win32-msvc) : 3,976 kb
> Qt Creator (win32-g++)                         : 10,305 kb
> Qt Creator (win32-g++ / upx)                 : 3,700 kb
>
> On Mon, Mar 30, 2009 at 12:51 PM, Malyushytsky, Alex <alex at wai.com 
> <mailto:alex at wai.com>> wrote:
>
>     Francisco,
>
>     As far as I know QT does not support anything, but gcc 3.4.2 on
>     Windows yet.
>     So even it might have better optimizations you have no way to use it.
>
>     About performance. I would call an Intel compiler a king of
>     performance on Windows. Even though I have negative experience
>     with Intel support and reliability these days, we use Intel
>     compiler in our office.
>     Due to the nature of our product we need the best performance
>     possible and found that intel compiler provides the best one.
>
>     If you want to compile QT with it, you might have a problem. Qt
>     4.5 I believe has issues with using Intel CC 10.
>     But we don't have problems linking code compiled with Intel and
>     msvc compilers together, so there is a work around, if you can
>     split your QT based gui and modules you need to be compiled with
>     Intel compiler.
>
>     So my answer was related to usage gcc 3.4.2 over msvc, which is
>     correct according to my experience.
>
>     If you have better answer, you are welcome to correct me.
>     But please respond to the mailing list. This may give others, not
>     only me  an opportunity to participate or learn from discussion.
>
>     Alex
>
>
>     -----Original Message-----
>     From: Francisco Ares [mailto:frares at gmail.com
>     <mailto:frares at gmail.com>]
>     Sent: Sunday, March 29, 2009 10:57 PM
>     To: Malyushytsky, Alex
>     Subject: Re: [Qt-interest] win32-g++ compiled Qt app much bigger
>     than win32-msvc compiled one?
>
>     2009/3/28 Malyushytsky, Alex <alex at wai.com <mailto:alex at wai.com>>:
>     > I would say no matter what you do msvc compiler has the better
>     optimization.
>     >
>     > I am not sure, if you can improve anything in your case,
>     >
>     > but in general you should get smaller files and/or faster
>     application using
>     > either msvc compiler on Windows.
>     >
>     >
>     >
>     > Alex
>     >
>     >
>     >
>
>     AFAIK that's the opposite, gcc has better optimizations, specially
>     gcc4 - recent versions, of course, that are able to use the specific
>     instructions from Intel's dual core processors - also considering you
>     are able to use the mingw port.
>
>     ... and there is always UPX
>
>     http://upx.sourceforge.net/
>
>
>     --
>     "If you have an apple and I have an apple and we exchange apples then
>     you and I will still each have one apple. But if you have an idea and
>     I have one idea and we exchange these ideas, then each of us will have
>     two ideas." - George Bernard Shaw
>
>
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