[BUG] Microsoft.VisualStudio.Code.ServiceHost extremely high memory consumption [1.9.8]

[MihaPro-CarX]

Describe the Issue

I'm working with a large Unity project. The solution contains from 129 to 301 projects, depending on the settings. When upgrading to C# Dev Kit 1.9.8 (pre-release), the memory consumption of the Microsoft.VisualStudio.Code.ServiceHost process increased sharply:

In the previous version 1.9.2 (pre-release) there was no such memory consumption:

Steps To Reproduce

1) Open a large project via Unity in VSCode 2) Wait for all projects to be parsed 3) View the memory consumption of the Microsoft.VisualStudio.Code.ServiceHost process in Process Explorer

Expected Behavior

The process does not consume gigabytes of memory.

Environment Information

• OS: Windows 10
• VSCode: 1.91.1
• C#: v2.39.28 (pre-release)
• C# Dev Kit: v1.9.8 (pre-release)

[arkalyanms]

@AArnott is this different from https://github.com/microsoft/vscode/issues/192043?

[AArnott]

@arkalyanms I don't see any correlation between that issue and this one. @MihaPro-CarX opened this bug at my request over at https://github.com/microsoft/vscode-dotnettools/issues/731#issuecomment-2240394392. I believe the project or language teams should investigate this.

[MihaPro-CarX]

Version 1.10.4 still consumes a lot of memory

[justonia]

Mem usage on a large Unity C# project:

It's gotten bad enough that I upgraded to 96gb of RAM to cope.

[ookuro19]

I turned off the automatic updates for the plugins and VSCode, then rolled back the version, and it seems to be working temporarily.

vscode: 1.90.2 C#: v2.33.17 C# Dev Kit: v1.7.25 .NET Install Tool: v2.0.6

Before rolling back, it almost used up the entire 32GB of memory.

[MihaPro-CarX]

I only have the C# Dev Kit extension rolled back to 1.9.2, the rest of the extensions are the latest versions. Then there is no such memory consumption and I can work normally.

[MihaPro-CarX]

C# Dev Kit version 1.10.6 does not have such memory consumption! It seems the problem has been resolved.