From: John Perry <john.perry@usm.edu>
Subject: Re: Performance of records with variant parts
Date: Mon, 22 Mar 2021 10:49:58 -0700 (PDT) [thread overview]
Message-ID: <23dcce3e-0db1-4417-a5d1-a05f03f74464n@googlegroups.com> (raw)
In-Reply-To: <s3akbl$dg3$1@dont-email.me>
On Monday, March 22, 2021 at 12:32:39 PM UTC-5, Jeffrey R. Carter wrote:
> On 3/22/21 6:02 PM, John Perry wrote:
> >
> > | case obj.kind is
> > | when Sphere =>
> > | -- do stuff
> > | when Plane =>
> > | -- do other stuff
> > | when None =>
> > | null;
> > | end case;
> >
> > Is there a reason that the record with variant parts runs so much slower? I can make the complete source available if need be.
> 1. Why is Surface a discriminant?
That's a good question. I don't remember why I made it a discriminant. That's easily fixed.
> 2. What are the quantitative timing requirements for the program? Does the
> difference affect whether or not they are met?
This is a raytracing program. There are no particular timing requirements, but if I wanted a larger image with more objects things would get ugly. This is really more a matter of my curiosity.
> 3. What is the declaration of Obj?
Obj is an "in" parameter to a function. Do you need more than that?
john perry
next prev parent reply other threads:[~2021-03-22 17:49 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 17:02 Performance of records with variant parts John Perry
2021-03-22 17:32 ` Jeffrey R. Carter
2021-03-22 17:49 ` John Perry [this message]
2021-03-22 17:54 ` John Perry
2021-03-22 19:31 ` Jeffrey R. Carter
2021-03-22 22:11 ` John Perry
2021-03-23 9:31 ` Jeffrey R. Carter
2021-03-23 14:27 ` Simon Wright
2021-03-23 23:00 ` John Perry
2021-03-23 23:27 ` Jeffrey R. Carter
2021-03-26 15:38 ` Stephen Leake
2021-03-26 15:44 ` John Perry
2021-03-30 7:12 ` Emmanuel Briot
2021-04-01 0:03 ` John Perry
2021-04-01 6:45 ` Emmanuel Briot
2021-04-01 13:38 ` Niklas Holsti
2021-04-02 16:07 ` John Perry
2021-03-22 17:39 ` Dmitry A. Kazakov
2021-03-22 17:45 ` John Perry
2021-03-22 18:07 ` Dmitry A. Kazakov
2021-03-22 18:23 ` John Perry
2021-03-22 20:30 ` Dmitry A. Kazakov
2021-03-22 18:59 ` Niklas Holsti
2021-03-22 21:54 ` John Perry
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