Optimization of gfortran for execution speed

[Feng Wang]

--- Richard Henderson <rth@twiddle.net> wrote:

> On Thu, Oct 20, 2005 at 12:15:05PM -0400, Andrew Pinski wrote:
> > A way to speed/fixing this up, is to make struct array1_real4 for each 
> > array
> > at the beginning of the function, even though they might not be used.
> > You should be able to let DCE do its job of cleanuping up unused 
> > structs.
> 
> More than that: if the array is SAVEd (or other Fortran words that
> mean it's in static storage), the descriptor can be static as well,
> and reside in read-only memory.
> 

But the initialization still remains in the loop, especially invoking malloc()
and free() functions, which are the main cost.



Best Regards,
Feng Wang

--
Creative Compiler Research Group,
National University of Defense Technology, China.


	
	
		
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