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<div class="moz-cite-prefix">Maybe there should be a comment
regarding the performance and risk of change?</div>
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<div class="moz-cite-prefix">-Brian</div>
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<div class="moz-cite-prefix">On 8/21/24 07:54, Faith Ekstrand wrote:<br>
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cite="mid:CAOFGe96ZsSauGpcE99v4KF3xqhPHS1Uh4NtspABMRPfjOiytXA@mail.gmail.com">
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<div>I've actually benchmarked this and 32bit is still faster on
many modern CPUs.</div>
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<div>Also, I would be very surprised if we could change it
without breaking the universe. I'm sure there are hard-coded
32s various places.</div>
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<div>~Faith<br>
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<div dir="ltr" class="gmail_attr">On Wed, Aug 21, 2024 at
8:13 AM Christophe JAILLET <<a
href="mailto:christophe.jaillet@wanadoo.fr"
moz-do-not-send="true" class="moz-txt-link-freetext">christophe.jaillet@wanadoo.fr</a>>
wrote:<br>
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<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
I'm new to this list, so sorry if it is not the correct place.<br>
<br>
I've started to looked at the source code of mesa and I wonder
why in <br>
src/util/bitset.h we have:<br>
<br>
#define BITSET_WORD unsigned int<br>
<br>
This is as-is since at least 2015, probably 2011.<br>
<br>
Would it make sense to have it as a long, at least on 64 bits
arch?<br>
(the linux kernel uses bitmaps as unsigned long)<br>
<br>
I don't think that it should be a noticeable speed-up, but at
least on <br>
Linux it could save some cycles when doing some OR or AND and
co on <br>
bitmaps on a 64 bits cpu.<br>
<br>
Just my 2c.<br>
<br>
Christophe JAILLET<br>
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