The issue is due to very limited NVRam in the Simulator VM. This is by design. The old simulator versions that installed on top of linux were being abused as people were trying to run it production. Current simulators are installed with ~2mb nvram. Enough for very basic disk io.
I have been able to do basic functionality but it will stay slow.
You may be better off with having a dedicated small SAN and either vfiler/vserver for demos, or have a VMware host running OnTap Edge to run Demos against.
I have ran esxi within VMWare Fusion on my laptop, and had Ontap Edge within it, along with vms for SRM/vCloud and other apps, and I was able to get it to perform for demos.
R. Jarett Kulm
VCP5-DCV/VCP5-IaaS, NCIE-SAN, NCDA 8.1 7-Mode & Cluster, F5 CSP, RCSA-V/WAN
Professional Services Engineer