[Gambas-user] VB6 to Gambas Global arrays

[R A Turney]

Thanks for the very informative replies to my questions.

Rob Kudla wrote:
> On Mon July 17 2006 13:13, R A Turney wrote:
>> an Intel Xeon 1.8 Ghz.  On my "converted to Gambas" version
>> running on my home computer, AMD Athlon XP 2000+, and SuSE
>> 9.3, it takes roughly ten seconds.  That's why I assumed it
>> was interpreted code.  I am hoping that after my direct
> 
> Don't be misled.... while Gambas may have a compiler, it's still 
> an interpreted language.  The Gambas compiler creates its own 
> flavor of pseudo-code, not actual machine code, and the archiver 
> just takes those p-code object files and jams them together into 
> an "executable" that really runs as a script (head -1 
> myproject.gambas should give you "#!/usr/bin/gbx2" or something 
> like that, instead of a bunch of binary ELF gibberish as you'd 
> find in a Linux machine code program.)
> 
> For most of what Gambas is meant to do, this is fine, but yeah, 
> it might be at a disadvantage against VB for straight-up math.  
> (I have VB running under VMware on one of my workstations; maybe 
> I'll set up a Linux VMware session to benchmark them fairly.)

I'll do the same with some other calculations, and run them on the same 
hardware.  The VB6 application that I was talking about should be 
considered extremely calculation-bound because of the iterative process. 
  When I first wrote it several years ago, I monitored the iterations 
and found it required an average of 20 to 50 iterations to converge per 
data point.  THere are 200 data points.  I think that this code can be 
improved to reduce the number of iterations required to converge.  I 
never bothered with it in VB6 since it took less than a second to solve.

-Bob

> 
> Maybe it would be possible to write a Gambas component to let you 
> write strictly mathematical expressions and execute them using 
> libm or something.  I wouldn't know if that would actually work 
> or how to do it, though.
> 
> I hope that someday someone will either write a Gambas bytecode 
> to machine code crosscompiler, or add the ability to generate 
> machine code in the Gambas compiler.  This is way beyond my 
> ability and more than most people want or need from Gambas, so 
> I'm not holding my breath.
> 
> Rob
> 
> 
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