I have several utilities written in c# for Framework 4.8. After upgrading from Windows 10 to 11, the utilities are running ~4 times slower. Has anyone encountered this?

The utilities parse large files (~600...~800 MB). The disk (SSD) is not encrypted. Everything else seems to be working fine. No other changes have been made except the OS upgrade itself.

Troubleshooting I made:

1. Recompiled - no effect
2. Compiled with .Net 6 - no effect
3. Run the utility with input and output files on the external SSD drive - little bit slower than on the internal drive which is expected
4. Run the utility on a Windows 10 VMWare virtual machine running on the same host (the virtual machine resides on the external drive) - it works as fast as earlier on the host.

All other applications on the physical computer seem to run normally; there are no visible slowdowns.

I have several utilities written in C# for .NET 4.8. After upgrading from Windows 10 to 11, the utilities are running ~4 times slower. Has anyone encountered this?

The utilities parse large files (~600...~800 MB). The disk (SSD) is not encrypted. Everything else seems to be working fine. No other changes have been made except the OS upgrade itself.

Troubleshooting steps I've taken:

1. Recompiled - no effect
2. Compiled with .NET 6 - no effect
3. Run the utility with input and output files on the external SSD drive - little bit slower than on the internal drive which is expected
4. Run the utility on a Windows 10 VMWare virtual machine running on the same host (the virtual machine resides on the external drive) - it works as fast as earlier on the host.

All other applications on the physical computer seem to run normally; there are no visible slowdowns.