[Gambas-user] Getting Gambas up to speed.

[Benoit Minisini]

On Wednesday 06 July 2005 01:45, Joseph Murphy wrote:
> Hi Michael
>  I did some testing with do while and for next loops and it does seem to be
> rather slow.  To do a for next loop that does nothing except increment the
> counter it took 14 seconds to go from 1 to 10000000.  I only tested up to
> ten million but 14 seconds does seem slow and gbx2 was using 99 percent of
> the cpu according to top.
>
>  I then checked out your DeepSpace project.  I found something different
> with it.  gbx2 was taking only 13 percent of the cpu time and X was taking
> 85 percent.  I think there are multiple issues with the speed problem.
>
>  I then checked out the optimization of the gambas compile and it is being
> optimized for size.  I haven't had the time to see if there is an increase
> if it is optimized with -O3 instead of -Os but I doubt that there will be
> much difference.
>
>  This does seem to be something that needs further investigation.
>
> Joseph
>

I know that looping is slow in Gambas, but I think it is more interesting to 
test the other parts of the language (arithmetic, strings, ...) because a 
program that loops is only a buggy program ;-)

I looked at DeepSpace, I modified it to run 500 objects, and I have the same 
conclusion. Drawing is slower than calculating in this case, but it mainly 
depends on your graphical driver, as the drawing area is updated (i.e. the 
cached pixmap is redraw to the screen) at each frame.

Regards,

-- 
Benoit Minisini
mailto:gambas at ...1...