I'm using latest (as of today) Mojave on a Mac Pro 3,1 with a GTX680 under APFS, and generally things work very well. I'm super grateful for the patcher and all the great work here.
I'm looking for clues about poor performance of Parallels 14 (14.1.3) virtual machines, both Linux and Windows, under this regime. My VMs are insanely compute bound and glacially slow, like a key operation is taking 10 or a 100 times as long as it should. I say compute bound, because the VM CPU indicator goes on full for minutes at a time when the system is just doing housekeeping, but I suspect the hangup is connected with I/O. E.g., after a boot, the VM crawls as the guest does its chores. After being allowed to rest, it becomes usable, barely. Simple GUI stuff has poor response, like how it feels when you use screen sharing over a slow connection.. Yet purely compute activities like a GIMP filter seem to run about normal.
I've scoured the Parallels forums, and the web in general for clues and coming up empty-handed. Seen some complaining about very poor Parallels performance on Mojave back around 10.14.3 or so, but no resolutions, as if maybe it go fixed by a MacOS point release?
Anyone else using Parallels on legacy Macs seeing bad performance?
Suggestions for how to investigate what's holding things up?
TIA