On Tue, Jan 30, 2024 at 11:23:57AM +1300, David Rowley wrote:
> On Tue, 30 Jan 2024 at 08:32, Nathan Bossart <nathandbossart@gmail.com> wrote:
>> I'm currently +0.1 for this change. I don't see any huge problem with
>> trimming a few instructions, but I'm dubious there's any measurable impact.
>> However, a cycle saved is a cycle earned...
>
> FWIW, In [1] and subsequent replies, there are several examples of
> benchmarks where various bitmapset functions are sitting high in the
> profiles. So I wouldn't be too surprised if such a small change to the
> WORDNUM and BITNUM macros made a noticeable difference.
Good to know, thanks. If there is indeed demonstrable improvement, I'd
readily adjust my +0.1 to +1.
--
Nathan Bossart
Amazon Web Services: https://aws.amazon.com
