My work with VCV Rack 0.6.1 has been a bit better than with 0.5.x, but it's still got some issues. Running it on multicore is pointless as it only deals with a single processor at a time. Because of this, it would seem that some howling-fast i7 or i9 (if you've got the buck$) would be the best pick to either drop the latency or allow it to run very large (50+ module) patches. I did notice, also, that 0.6.1 has a control up in the file menu that puts time utilized indicators on each module. See https://vcvrack.com/manual/Toolbar.html for more on this.