[Qt-creator] speed up Build process

[Andre Poenitz]

On Sat, Jan 10, 2009 at 12:37:44AM +0100, Piotr Rak wrote:
> 2009/1/9 Zine eddine Bendjaballah <zineeddine.b at hotmail.com>:
> > I'm new with qt, I'm using qt creator since recently. It takes more time to
> > build and run a program.
> > And when I run in debug mode,the running time takes several seconds.
> >
> > I'm used to RAD environment, like Delphi, and the time to compile and run a
> > program is insignificant.
> >
> > Is it proper to Qt programs, or is there some configurations to do to
> > accelerate the build and debug process.
> 
> I assume below, that you run linux, or atleast use gnu toolchain.

Unlikely, as he mentions Delphi ;-}

Of course, trying to make comparisions is hard in this case.

> If it is not case, I really don't know how to help you. Maybe someone
> else knows.
> 
> To compile faster, you might try setting up ccache (http://ccache.samba.org/).
> Also adding -jN argument to 'make' command might help, where N usually
> is number of your processor cores +1, like -j3 for dual core. Hmm,
> maybe Qt-creator could do something like this out of box?

This has been discussed a while ago, and I still don't think it's
a good idea. People using build farms want more than that, and there
are several possible solution outside Qt Creator like using the 
MAKEARGS environment variable.

> About startup time of your code, well...
> maybe checkout http://en.wikipedia.org/wiki/Prelinking, I never tried
> that for development though. For debugging you could use striped from
> debugging symbols versions of some libraries (those you know you don't
> really need/want to debug). Please check 'man strip' for more info.

Almost all of the debugger startup time is indeed due to the loading
of debug symbols.

Regards,
Andre'