DeadStores S1854 is extremely slow

[rauhs]

Hello,

version:

PackageReference Include="SonarAnalyzer.CSharp" Version="8.33.0.40503"

I am seeing

Analyzer Summary
    14:22.455   SonarAnalyzer.CSharp, Version=8.33.0.0, Culture=neutral, PublicKeyToken=c5b62af9de6d7244
        SonarAnalyzer.Rules.CSharp.DeadStores (S1854) = 6:25.949
        SonarAnalyzer.Rules.CSharp.PrivateFieldUsedAsLocalVariable (S1450) = 1:22.248
        SonarAnalyzer.Rules.CSharp.ClassAndMethodName (S100, S101) = 23.728 s
        [...]
    2:32.987   Microsoft.CodeAnalysis.NetAnalyzers, Version=6.0.5.1901, Culture=neutral, PublicKeyToken=31bf3856ad364e35
        Microsoft.CodeQuality.Analyzers.Maintainability.AvoidDeadConditionalCode (CA1508) = 47.422 s
        Microsoft.NetCore.Analyzers.Security.ReviewCodeForInformationDisclosureVulnerabilities (CA3004) = 20.500 s
        Microsoft.NetCore.Analyzers.Runtime.DisposeObjectsBeforeLosingScope (CA2000) = 16.725 s
        [...]

which is from a /p:ReportAnalyzer=true.

I've reported it also to Roslyn:

dotnet/roslyn-analyzers#5870

I'm not entirely sure if this is now a Roslyn or a SonarSource issue.

[pavel-mikula-sonarsource]

Hi @rauhs,

Thank you for reporting this. We're investigating the issue in #5384 that you can track.