Commits on Jul 12, 2023

1. Set the SF16 pure NNUE reference nps wrt SF11 …

   Fishtest with Stockfish 11 had 1.6Mnps as reference nps
   and 0.7Mnps as threshold for the slow worker.
   Set the new reference nps to 0.64Mnps according to the 60% slowdown
   of the SF 16 wrt SF 11 on the ARCH=x86-64-bmi2
   Set the new threshold for slow worker to 0.231Mnps according to
   the 67% slowdown of the SF 16 wrt SF 11 on the ARCH=x86-64-sse41-popcnt
   
   compiler clang++ 16.0.6
   
   - arch=bmi2 (Intel Xeon CPU E5-2680 v3)
   ```
   sf_base =  1515099 +/-   6276 (95%)
   sf_test =   610755 +/-   2686 (95%)
   diff    =  -904343 +/-   5940 (95%)
   speedup = -59.689% +/- 0.392% (95%)
   ```
   
   - arch=sse41-popcnt (Intel core i7 3770k)
   ```
   sf_base =  1929595 +/-  19733 (95%)
   sf_test =   654161 +/-   5421 (95%)
   diff    = -1275433 +/-  14999 (95%)
   speedup = -66.099% +/- 0.777% (95%)
   ```
   
   Raise worker version to 207, also server side.

   

   ppigazzini committed Jul 12, 2023
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