17.6.x consumes lot of CPU #4553

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1. Jakub Jareš (nohwnd)

   closed this as completedin #4556on Jun 16, 2023
2. cremor commented on Jun 21, 2023

   

   cremor

   on Jun 21, 2023

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   I just found this entry in the Visual Studio 17.6.4 release notes:

   When multiple test projects are run in sequence, vstest.console can consume a lot of CPU because it is constantly polling for data from testhost that is started but not executing yet. This was mitigated by disabling testhost pre-start. This regression was introduced in 17.6.0.

   I assume that means this issue?
   If yes, does that mean the issue was fixed with a Visual Studio update? So we don't have to wait for an eventually upcoming version 17.6.3 of the NuGet package Microsoft.NET.Test.Sdk?
3. nohwnd commented on Jun 26, 2023

   

   Jakub Jareš (nohwnd)

   on Jun 26, 2023

   MemberAuthor

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   cremor Yes. This issue is impacting vstest.console and it's consumers (such as dotnet test), we've inserted into VS and dotnet SDK, but did not yet release 17.6.3 nuget package, which would fix users that are using VS platform Installer task.

   This issue has no impact on Microsoft.NET.Test.Sdk, because that package is used to ship testhost.
4. Jakub Jareš (nohwnd)

   added 2 commits that reference this issue on Mar 25, 2026

   Add regression tests for untested bug fixes

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   406885c

   Add 365 regression tests for untested bug fixes (#15615)

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   2dfa64d