Performance regression in Starcraft Broodwar 1.16 with cnc-ddraw (with bisect) about box86 HOT 3 OPEN

Noticed with wine 5.13 initially, tried with wine 8.01 no difference.

from box86.

In addition: launching with a higher priority (nice -n -10) really tanks performance, which it did not do before.

launching like so hitches terribly
sudo --preserve-env nice -n -10 su pi -c "WINEDLLOVERRIDES=ddraw=n,b WINEPREFIX=/home/pi/wine/.wine LD_LIBRARY_PATH=/home/pi/wine/lib/wine/:/home/pi/wine/lib/ /usr/local/bin/box86 /home/pi/wine/bin/wine ./StarCraft.exe"

Launching without nice like so it's not nearly as bad, but slower than it used to be.
WINEDLLOVERRIDES=ddraw=n,b WINEPREFIX=/home/pi/wine/.wine LD_LIBRARY_PATH=/home/pi/wine/lib/wine/:/home/pi/wine/lib/ /usr/local/bin/box86 /home/pi/wine/bin/wine ./StarCraft.exe

Without cnc-ddraw and nice -10 it is the same as before that commit without cnc-ddraw and nice -10 (no regression there, but just not as smooth as with cnc-ddraw before)

Without sudo nice and cnc-ddraw, it is better than with nice -10 and cnc-ddraw, but slower than before with cnc-ddraw (nice or no)

before commit 632a01d it ran fine and very smoothly with cnc-ddraw (with and without sudo nice), basically equivalent to the native arm client.

With current box86 head it is playable with cnc-ddraw but just not as smooth as before. In addition, nice -10 somehow exacerbates it, tanking performance badly. Without nice the performance loss isn't as stark, but since nice exaggerates it and make it easier to see it might be helpful for tracking down the performance loss. Which again seems specific to cnc-ddraw: wine's built-in ddraw seems to perform the same as before (which is almost there but not quite)

from box86.

Thanks for the analysis. I'll have a look, it shouldn't be slower.

from box86.