Intellisense after closing a solution and opening another one?

[Thorium]

I updated my VS to latest version (17.12.4) and first of all I have to say things have improved a lot from what it was a few months ago:

1. The solution and intellisense loads fast (seconds, not minutes)
2. And the memory consumption is around 2GB which is not bad.
3. And both of these despite using a lot of TypeProvider instances of many providers (FSharp.Data, SwaggerProvider, SQLProvider, ...)

So thanks for that!

Only a minor issue I found: If I close a solution and open another one without closing Visual Studio, then the intellisense doesn't load.

I tried twice with different F# solutions, did happen on both times: First loads fine, second time not.

No worries, workaround is just to restart VS between switching solutions.

Provide any related information (optional):

• Operating system: Win 11
• .NET Runtime kind: 9.0.102. Solution has it all: .Net standard libraries, .Net 9 executable and .Net Framework 4.8 executable
• Editing Tools (e.g. Visual Studio Version, Visual Studio): VS 2002 17.12.4

[majocha]

It is possibly TP related because there are some solutions that I can switch between with no issue.
The thing is, we reuse the checker between solutions and only clear some caches on solution close. Apparently this does not always work:

fsharp/vsintegration/src/FSharp.Editor/LanguageService/LanguageService.fs

Lines 242 to 246 in 950437d

	member _.OnAfterCloseSolution(_) =
	projectManager.Checker.ClearLanguageServiceRootCachesAndCollectAndFinalizeAllTransients()
	metadataAsSource.ClearGeneratedFiles()
	projectManager.ClearAllCaches()
	VSConstants.S_OK

[T-Gro]

@0101 : Is cache clearing, incl. TP's, different enough with TransparentCompiler to try that with it?

[0101]

@0101 : Is cache clearing, incl. TP's, different enough with TransparentCompiler to try that with it?

I think this cache should be keyed by project, so it shouldn't be reused in a different solution. Unless type providers have some other cache somewhere. Could be worth a try. (Options F# -> Advanced -> Use Transparent Compiler (at your own risk 😄))

Also a bit suspicious that it happened in 17.12 update, don't think we've touched anything related there?

If we had some minimal repro we could take a look at what's happening.

[T-Gro]

@Thorium : Could you please send a link to a repro project where this happens?