Re: [Mesa3d-dev] dynamic code generation with gcc

[Keith W. <ke...@va...>]

Josh Vanderhoof wrote:
> 
> Gareth Hughes <ga...@va...> writes:
> 
> > Compiling this with the code Josh sent takes around 70 msec on my 700MHz
> > PIII laptop.
> >
> >    void codegen_test( void )
> >    {
> >       printf( "hello, world!\n" );
> >    }
> >
> > That's a long time at 60fps...
> 
> I would think you would keep a cache of the stuff that you've compiled
> to avoid re-compiling every time you want to call the routine.  So
> you're really looking at a one time start up cost.  Is there something
> where the code would change on every single frame?

Yes.  I think you'd probably see less than 10 compiles at application startup
and then no more.  If applications behave in a wierd morphing way, just pull
the plug on compilation and let them use the generic code.

Keith