I have been experimenting with some of the aircraft, trying to figure out why some that are less detailed then others also run slower. You would think that a super high detail plane (like the Maule) would run very much faster then the Carenado C-185F in P3D.
To note, the Carenado was running at about 8 to 9 FPS on my rig in P3D. The Maule was at 20, sometimes touching 19, rarely ever 18. So the Maule is running like glass, and to me, it has more details in the VC then the 185F. I also found that my own Aerospool Dynamic was running at just higher then the 185F, at about 10FPS.
I found that the Carenado had Bitmaps for textures in the folder system, even with bump mapping and such, all BMP's instead of DDS. I knew from following posts by Aces that DDS textures, flipped, run faster in the sim. To test this, I converted all textures in the 185F to DDS/Flipped, and it rose up about 1 to 2 FPS, now running at 10 FPS instead of 8. (Mind you, this is in an ORBX rich scenery environment, Diamond Point and Pacific North West scenery packages, so to be fair, this is in a RAM intensive environment).
But, oddly, the 185F was now running as fast as my Dynamic, which was pure FSX (except from the gauges, hold that thought). The 185F is a very beautiful model, very nicely done, but also not very sophisticated (technically speaking, the interior has less componentry then the dynamic, etc, etc). So I would think the 185F would be running at 20 FPS.
Then, it occurred to me. What if its the new FSX XML gauge coding. MS had redone the coding in XML to a new format, which I hated like crazy, like redesigning the wheel. This coding is also 'pure' FSX, which means it runs faster then the FS9 XML format.
I tested this. I renamed the 185F panel folder to OriginalPanel and dropped in a copy of the Maule panel folder, started up P3D, and Voila, 20FPS locked. The gauges were the culprit in keeping the frames from running high.
Its a let down for me, which means all my FS9 coded gauges in my fleet of a dozen product lines/aircraft lines would need to be totally rewritten to run as fast as possible. I love fast. Smooth frames are where its at. Not everyone can afford a powerful computer, (like me), so finding the best ways to run planes fast is a requirement.
So, that was my finding on why the 185F (and my Dynamic) run so dang slow in P3D. Gauges.....