From: Shark8 <onewingedshark@gmail.com>
Subject: Re: GNAT vs Matlab - operation on multidimensional complex matrices
Date: Tue, 31 Mar 2020 12:54:03 -0700 (PDT)
Date: 2020-03-31T12:54:03-07:00 [thread overview]
Message-ID: <e0e7d1ba-ca23-470d-b2f4-3b61a26946ab@googlegroups.com> (raw)
In-Reply-To: <ly8sjg49h0.fsf@pushface.org>
On Tuesday, March 31, 2020 at 1:20:45 PM UTC-6, Simon Wright wrote:
> Shark8 writes:
>
> > Ok then; the following should have convention Fortran IIRC:
> >
> > type tCubeReal is array (1..NumChannels, 1..NumAngles, 1..NumRanges) of mReal
> > with Convention => Fortran;
>
> I wondered about this; the code ran considerably slower with Convention
> => Fortran.
Interesting / unexpected.
I wonder... could it be that the CPU is itself optimized for row-major access?
It also looks like the For/Of loop takes longer than indexes on nested-for.
next prev parent reply other threads:[~2020-03-31 19:54 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-23 23:16 GNAT vs Matlab - operation on multidimensional complex matrices darek
2020-03-24 2:07 ` johnscpg
2020-03-24 6:40 ` J-P. Rosen
2020-03-24 9:37 ` Jeffrey R. Carter
2020-03-24 14:55 ` darek
2020-03-24 15:44 ` johnscpg
2020-03-31 17:25 ` Shark8
2020-03-31 19:20 ` Simon Wright
2020-03-31 19:54 ` Shark8 [this message]
2020-04-29 21:08 ` vincent.diemunsch
2020-04-01 11:01 ` darek
2020-04-01 15:01 ` J-P. Rosen
2020-04-01 16:39 ` darek
2020-04-01 17:15 ` J-P. Rosen
2020-03-31 20:05 ` Shark8
2020-03-31 20:51 ` Jeffrey R. Carter
2020-06-08 17:42 ` Shark8
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