Restore packages in 9.0.200 takes a very long time

[mnmr]

NuGet Product Used

dotnet.exe

Product Version

9.0.200

Worked before?

9.0.103

Impact

Other

Repro Steps & Context

I'm having issues with the new package restore logic, which is seemingly taking forever (aborted after 3 minutes).

I'm restoring packages using dotnet restore -f -v d <sln> but don't see anything useful in the console before the command is cancelled. It lists increasingly long restore times, with some projects completing in ms and others going on for minutes.

We're using centralized package version management and all versions are explicit (no wildcards). There's ballpark 150 projects in the solution.

Adding <RestoreUseLegacyDependencyResolver>true</RestoreUseLegacyDependencyResolver> to Directory.Build.props is a workaround. For reference, the old way of restoring packages completes in ~4s.

Verbose Logs

[jeffkl]

@mnmr sorry you're experiencing this issue. Fortunately, we've already fixed in and are in the process of releasing it. Its currently fixed in Visual Studio 17.13.1 and NuGet 6.13.2 and we're working on getting .NET 9.0.2xx updated. For now, as you've pointed out, setting RestoreUseLegacyDependencyResolver is a workaround.