5/3 GBps R/W on virtiofs Shared Directories vs 4.5/0.6 GBps R/W on Guest Boot Disk

[runwaygoats]

I did tests for disk performance and got very interesting results.

1. Could you please confirm that I am not missing anything?
   I used macOS 14 Beta as host and guest OS. I want to make sure that the results are not infected by this.

2. If everyone has similar results, is there any way to increase write performance on Guest Boot Disk?
   Otherwise, it seems that you get way more write performance working with the files on Host OS.
   But I did not test latency.

Blackmagic Disk Speed Test Results

                                                                                           Write               Read

Host OS
Host Boot Disk 7.0 GBps 6.0 GBps

Guest OS
Guest Boot Disk 0.6 GBps 4.5 GBps

Accessing Host Boot Disk from Guest OS
smb 0.6 GBps 0.7 GBps
virtiofs 3.0 GBps 5.0 GBps

Configuration**

• UTM Version: 4.3.5 (87)
• macOS Version: 14.0 Beta (23A5312d)
• Mac Chip (Intel, M1, ...): M1
• Guest OS: macOS 14.0 Beta (23A5312d)