The Reasons for poor performance of Windows when the CPU type is host

[Khensu]

can you check if VBS (virtualization based security) is running in host, and not running in x86-64-v3? i think it should be responsible for slowdown

If you use "host" please remove the nested-virt flag from the CPU to prevent VBS.
VBS is heavily slowing down Windows VMs and can cause issues (even with the v4.

What VBS ?

As @ucholak said, Virtualization based security. Basically a windows feature for security. Explained here: https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/oem-vbs

 

[adolfotregosa]

If you use "host" please remove the nested-virt flag from the CPU to prevent VBS.
VBS is heavily slowing down Windows VMs and can cause issues (even with the v4.

As @ucholak said, Virtualization based security. Basically a windows feature for security. Explained here: https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/oem-vbs

I apologize if I wasn't clear, on a Fedora 43 VM? If I provided incorrect information in my previous post, please let me know so I can fix it!

 

[Khensu]

I apologize if I wasn't clear, on a Fedora 43 VM? If I provided incorrect information in my previous post, please let me know so I can fix it!

Oops, only read the topic about Windows
Actually I don't know if Fedora is doing smth similar like VBS xD I doubt it.
Honestly,m now I wonder why "Host" is causing slow downs in Fedora. But we shouldn't keep posting in an old thread like this (As it is about Windows)

 

[adolfotregosa]

Oops, only read the topic about Windows
Actually I don't know if Fedora is doing smth similar like VBS xD I doubt it.
Honestly,m now I wonder why "Host" is causing slow downs in Fedora. But we shouldn't keep posting in an old thread like this (As it is about Windows)

Sure, but it's not that old and apparently not exclusive to windows hence me thanking the OP for giving me the idea to try it!