The game isn't resetting the conf.ini anymore since I reinstalled BAT, it's letting me run with Water=4 now and I don't have the file set to read only. Even when I tried using the default conf.ini that came with BAT, the performance remained exactly the same, even running at 1024x768 resolution.
A few more things I've discovered in the test I currently have running in the background:
-Looking at the sky doesn't solve the problem every time, only sometimes, and you have to look at it for a few seconds before it starts improving performance.
-If I reduce game speed to 1/2, it suddenly starts running smoothly, no matter where I look. I'm in an He 111 on Dusseldorf airfield and zooming all the way out, looking around at the huge city to the south and the water of the river produces a smooth framerate at 1/2 speed. Going over to the city doesn't reduce my FPS at all. If I go up to Full Speed, the game becomes choppy again. The more I reduce speed, the better the game runs.
-The log is producing time overflow messages only when I have the game at Full Speed. If I'm at 1/2 speed, there's no time overflow.
-Seems the game's memory usage is steadily increasing in Task Manager as I let the mission run. It was at 1.1 million K when I first loaded it up, and it's slowly climbed its way past 1.4 million K, and the mission is slowly starting to run better as it does so. It's been running for 20 minutes now and the game isn't giving me Time Overflow at full speed anymore. At 30 minutes, seems it capped out at 1.45 million K and went back down.
I have YPack downloaded as well - I'll try and find a mission that works between BAT and YPack and compare the performance of the two. Because I have a funny feeling that BAT is going to continue to run at a bad framerate. Honestly, to me it seems like I'm still running into the Java Wall somehow, but that just makes no sense at all, considering I'm on The Blitz...
My basic specs are:
Windows 10 64-bit
NVidia GTX 1080
AMD Ryzen 1600 6-core 3.60 GHZ
8GB RAM
This PC generally runs both newer and older games at the highest settings at at least 45-60 FPS. It's solely IL-2 that's giving me trouble.
I'll have to get an FPS overlay up so I can prove what I'm seeing here, and I'll try updating my drivers, but I only got this new PC back in February. I haven't tried the mission on my old PC with worse specs yet.
EDIT: Nearly at 40 minutes of mission time now and I've nearly reached a perfectly smooth framerate at full speed...the longer I run this mission, the better the performance. Unfortunately I have to do something else now, so my testing concludes here. But at 40 minutes, the game was running at something like 25-30FPS I'd say. Quite the improvement over the barely even 5 FPS it got at the start.
I've also noticed an unrelated bug: the He 111H-2s I'm flying have their full-throttle engine flames coming out from behind and above where they should be coming out of the cylinders.