Yeah, you're right. Sometimes I do see Todd Kopirova or someone respond though. Anywho.
The composition as is:
4K UHD
32-bit
4 EXR sequences (Although I replaced this with a tiff sequence to try to reduce processing requirements, but it had no noticeable effect)
A 6K psd image, 2 instances.
A 4K, tiff sequence (matte) precomped and 3 or 4 instances
About 50 animated shape layers with trim paths
36 White 200x200px squares with Noise, an RG Universe plugin, and a turbulent displace (Although I kept this turned off for most of it as it completely stalled out the system for minutes)
A particular layer (1 instance)
A starglow effect on the 6K psd
183 frames long.
And I think that's mostly it. Sounds like a lot, but I had a 6K comp using red footage and about 7 layers of particular with sever hundred thousand particles going on all at once, plus element 3d, keying, RSMB, and some other stuff going on, on an iMac last year using CC 2014 and it ran faster than what I'm getting now. And that previous project was also using a 32-bit comp. I should just re-install 2014, there is backwards compatibility right?
I did a similar test last night. It was in a 4K comp, with a 200x200 white solid and I dragged it around, it went to adaptive resolution while dragging but it updated in real time.
I'm willing to accept (as a last resort) that there is something with the software on my system and I need to do a complete re-install. Although, I'm not willing to do that before the project is over, which doesn't help me in this situation. There was a slight issue with Mocha, I had about 35 rotosplines all turned on at once and playback was about half real time. But, if I toggled off the splines I wasn't paying attention to at the time, it played back in real time no problem. So I suspect that behavior is to be expected (obviously not an Adobe product, but I thought I'd mention it).