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From: "Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org>
Subject: Re: Not good for Ada endorsement
Date: Thu, 15 Jul 2021 17:56:31 +0200	[thread overview]
Message-ID: <scplrl$npm$1@dont-email.me> (raw)
In-Reply-To: <0e6ee3e9-baad-47b3-872b-90ec6c735920n@googlegroups.com>

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.

-- 
Jeff Carter
"How'd you like to hide the egg and gurgitate
a few saucers of mocha java?"
Never Give a Sucker an Even Break
101

  reply	other threads:[~2021-07-15 15:56 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 [this message]
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
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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