Jim Ablett wrote: ↑Tue Jun 04, 2024 1:24 pm
...
Hi Guenther,
That's strange. What about the generic clang version ?
Jim.
Surprisingly (or not really, because I believe you pgo'ed vs. bench?) with bench it's a bit different.
The clang bench is a bit faster than the gcc bench 4.86x sec. vs. 5.55x sec. (several runs), but as the diff
in start pos is so overwhelming I won't trust the bench over real games here.
Probably a test of both versions over lots of games (10000s') would reveal more truth.
Guenther
P.S.
Well, the original 0.4b which has just two non-game playing relevant commits less, even has a better bench
for both avx2 and bmi2 of around 4.2x sec -4.3xsec for both. (but 5-6% lower nps for startpos, not conclusive)