Cloudmin performance virtio drivers etc

Host operating system:
Debian 9
Host OS version:
Stretch
Guest OS (if applicable):
window10 & win server
Guest OS version (if applicable):
Server

Looks like i am gettings very slow writes into the guest OS like 1.5 gb per minute… even though the guest OS is using nvme drive …

also guest os on windows does seems to take the core / virtual core count correctly…

was there any updates on cloudmin and cloudmin pro? or should i consider moving to proxmox ?