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Date: Wed, 1 Apr 2020 09:39:26 -0700 (PDT)
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Subject: Re: GNAT vs Matlab - operation on multidimensional complex matrices
From: darek <darek.maksimiuk@gmail.com>
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Xref: reader01.eternal-september.org comp.lang.ada:58274
Date: 2020-04-01T09:39:26-07:00
List-Id: <comp.lang.ada>

Hi Jean-Pierre,=20
 No, I did not evaluate it. This how I look at it:some of the functions (i.=
e.  FFT) (that have some local complex arrays inside), I need to call  ~320=
k-400k times per second (depends on the settings, and this is for the  simp=
ler 4x4 MIMO). So, even if a single allocation cost some microseconds, then=
 the total time is substantial.=20

The development of the code is in an early stage, and I do (almost) everyth=
ing to avoid using C :) :)  in this project (just kidding).=20

Regards,
   Darek=20


On Wednesday, 1 April 2020 17:01:12 UTC+2, J-P. Rosen  wrote:
> Le 01/04/2020 =C3=A0 13:01, darek a =C3=A9crit :
> > Thanks for all your posts. At this moment I use the access types to
> > avoid an overhead associated with allocation, and initialization of
> > these arrays
>=20
> Could you elaborate on this? Did you measure? Normally, accessing a
> statically allocated array is faster...
>=20
> --=20
> J-P. Rosen
> Adalog
> 2 rue du Docteur Lombard, 92441 Issy-les-Moulineaux CEDEX
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