cannot reproduce Perfomance

[dr_anthony]

Terrible performance, the same applies to the BS 2 after a recent update, compared to the AH-64D with three sensors turned on and images on three LCD in the simulator, when SHKVAL is turned on, the FPS drops by 20-30 units. In the cold cockpit fps - 60 

[rubbra]

In Vr by any chance? I have also noticed a huge performance difference of BS3 vs pretty much anything else. I’ve been flying quite a lot of BS2 in 2.8 recently, constant 40fps (ASW locked), in all scenarios, including the last thing I did before the update came out, which was the Caucasus instant action shooting range. Do the same with 2.8.1 and BS3, and I’m struggling around 14/15 fps. 
 

I had assumed it was just BS3, so gave up on it in disgust assuming it will improve in later releases. I hadn’t considered it might be BS2 as well - will test tonight. 

[edmuss]

I'm seeing a fairly significant frametime hit simply by uncaging the shkval, typically around 1.5-2ms, this is a much larger hit that the TGP on the A10C or BS2 on 2.7.

Reducing display resolution to 256 does improve things somewhat (about 0.8ms hit) but I've not had a chance to do more thorough testing. Once I have done I'll post up some results to see if the correspond to other people's results

[edmuss]

Some comparison screenshots from BS3.

Caucasus cold start instant action->load->auto start (time accelerated because of time!)->VR zoom on the shkval with it both caged and uncaged.

Screenshots taken at 256, 512 and 1024 display resolution settings.  G2 running 60Hz at 3128x3060 - recommended default openxr resolution for 12gb GPU.

Side by side at 256 resolution of caged vs uncaged, there is a 1.5ms difference between the two which equates to 7fps (~10%) loss

Side by side at 1024 resolution of caged vs uncaged, there is a 2.4ms difference between the two which equates to 15fps (~20%) loss

Obviously the higher resolution does look better and takes more resources but it seems much higher than it was in 2.7, I don't have 2.7 installed currently so can't test directly.  This perceived loss of performance may well be 2.8 related with the new lighting rather than BS3 specifically, testing BS2 back to back in both would perhaps be more conclusive as to whether it's module or version specific.

Will attach all of the testing screenshots on a seperate post.

Edited December 19, 2022 by edmuss

[edmuss]

Attached screenshots

Edited December 19, 2022 by edmuss

[dr_anthony]

Cold

Ready to fly

SHKVAL on

 

For comparsion Ah-64D 

Ready to fly 

Tads 

Fps drop presented but not to 20-22 

[edmuss]

One thing I have observed, is that obviously the complexity of the scene shown on the display affects the performance loss; trees seems to be a real killer.  It might be worthwhile setting up a mission with both comparative airframes side by side so that they can both focus on the same scenery.  I did try a test in the A10 and I found that in certain scenes the TGP loss was only about  0.5ms, whereas if I slewed it over some trees it suddenly jumped to ~2ms loss; have to compare apples to apples