From: Anh Vo <anhvofrcaus@gmail.com>
Subject: Re: Not good for Ada endorsement
Date: Fri, 23 Jul 2021 10:04:12 -0700 (PDT) [thread overview]
Message-ID: <aa90a8ba-2187-46c3-b15f-5a0fb6963df6n@googlegroups.com> (raw)
In-Reply-To: <73f3c6be-8de5-4ad7-a420-d33866d3c87bn@googlegroups.com>
On Thursday, July 15, 2021 at 9:29:52 AM UTC-7, Anh Vo wrote:
> On Thursday, July 15, 2021 at 8:56:40 AM UTC-7, Jeffrey R. Carter wrote:
> > On 7/15/21 5:13 PM, Lucretia wrote:
> > >
> > > I managed to get just under 4000 passes with a 1 bit array, but not using Ada's packed array. That's actually the slowest method, strangely.
> > So you have an array of a modular type, calculate an index and bit within it,
> > mask out that bit, and compare it to zero? I would have thought an unpacked
> > array of Boolean would be fastest.
> >
> > A packed array of Boolean requires all the operations above, plus shifting the
> > bit to the LSB and treating the result as a Boolean, so it may not be that
> > surprising that it's slower.
> Should fixed lower bound index array (-gnatX) speed it up?
Indeed, it does. As posted on Reddit Ada, I got 5476 Passes after changing array types to arrays having fixed lower bound index of 0 on lines 9 and 10 and compiling it using switch -gnatX -02. By the way, I used GNAT Studio 2021 running on Windows 10.
next prev parent reply other threads:[~2021-07-23 17:04 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-07 14:21 Not good for Ada endorsement Richard Iswara
2021-07-07 15:06 ` Luke A. Guest
2021-07-07 15:19 ` Doctor Who
2021-07-07 19:21 ` Simon Wright
2021-07-07 19:49 ` Doctor Who
2021-07-07 20:39 ` Luke A. Guest
2021-07-08 3:46 ` Richard Iswara
2021-07-08 8:20 ` Jeffrey R. Carter
2021-07-08 8:42 ` Dmitry A. Kazakov
2021-07-08 8:52 ` Luke A. Guest
2021-07-08 10:42 ` Jeffrey R. Carter
2021-07-08 10:51 ` Luke A. Guest
2021-07-08 11:12 ` Jeffrey R. Carter
2021-07-08 17:37 ` Luke A. Guest
2021-07-08 17:43 ` Luke A. Guest
2021-07-08 19:16 ` Luke A. Guest
2021-07-08 19:16 ` Luke A. Guest
2021-07-09 2:47 ` Richard Iswara
2021-07-09 8:10 ` Paul Rubin
2021-07-09 8:24 ` Egil H H
2021-07-09 8:33 ` Egil H H
2021-07-09 9:16 ` Jeffrey R. Carter
2021-07-09 9:21 ` Jeffrey R. Carter
2021-07-15 15:13 ` Lucretia
2021-07-15 15:56 ` Jeffrey R. Carter
2021-07-15 16:29 ` Anh Vo
2021-07-15 17:30 ` Lucretia
2021-07-16 16:27 ` Simon Wright
2021-07-16 16:28 ` Simon Wright
2021-07-23 17:55 ` Luke A. Guest
2021-07-23 17:04 ` Anh Vo [this message]
2021-07-23 17:12 ` Luke A. Guest
2021-07-15 16:29 ` Lucretia
2021-07-15 16:49 ` Dmitry A. Kazakov
2021-07-15 21:08 ` Jeffrey R. Carter
2021-07-11 15:54 ` Dennis Lee Bieber
2021-07-18 23:03 ` Mace Ayres
2021-07-19 1:00 ` Paul Rubin
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