I've actually benchmarked this and 32bit is still faster on many modern CPUs.
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. ~Faith On Wed, Aug 21, 2024 at 8:13 AM Christophe JAILLET < christophe.jail...@wanadoo.fr> wrote: > Hi, > > I'm new to this list, so sorry if it is not the correct place. > > I've started to looked at the source code of mesa and I wonder why in > src/util/bitset.h we have: > > #define BITSET_WORD unsigned int > > This is as-is since at least 2015, probably 2011. > > Would it make sense to have it as a long, at least on 64 bits arch? > (the linux kernel uses bitmaps as unsigned long) > > I don't think that it should be a noticeable speed-up, but at least on > Linux it could save some cycles when doing some OR or AND and co on > bitmaps on a 64 bits cpu. > > Just my 2c. > > Christophe JAILLET >
