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From: "Luke A. Guest" <laguest@archeia.com>
Newsgroups: comp.lang.ada
Subject: Re: Not good for Ada endorsement
Date: Fri, 23 Jul 2021 18:55:27 +0100
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On 16/07/2021 17:28, Simon Wright wrote:
> Lucretia <laguest9000@googlemail.com> writes:
> 
>> On Thursday, 15 July 2021 at 17:29:52 UTC+1, Anh Vo wrote:
>>
>>>> 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?
>>
>> On GCC 9.3.0:
>>
>>    -gnatX    Language extensions permitted
> 
> Ah, but which ones?
> 

Oh, I now think it's the 2012 extension which enables you do have (1 .. 
<>) or (0 .. <>) in array types, rather than a more useful command line 
option to normalise array indices to 0.