Slow .Net builds since upgrade to 9.1.5

Since the upgrade to TC 9.1.5, my builds are running much slower (2 or 3 times slower). See attached build stats

Checking the logs, all operations (Powershell, Compile, etc...) takes twice the time it was taking with previous release. I had previously noticed some degradations with 9.1.3 but that got fixed with 9.1.4 but I am now back to really poor performances.

Did somebody notice something similar?

Nothing has changed on the server recently and the last Windows Updates were installed 2 days before TC upgrade without any difference.


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After some more investigations, the root cause of the issue was very likely some high IO load caused by other VMs running on the same host. Fixing those cuts the build duration by 2!


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