Reducing memory allocations for file path maths

[TheAngryByrd]

WHAT

🤖 Generated by Copilot at 3612b5b

This pull request updates the FSharp.Compiler.Service library and introduces some performance and robustness improvements to the FsAutoComplete project. It removes some obsolete code, adds some error logging, optimizes some string and buffer operations, and enhances the language server protocol communication. It also adds two new NuGet packages: LinkDotNet.StringBuilder and CommunityToolkit.HighPerformance. It includes an unrelated change to the playground.fsx file that may need to be removed or explained.

🤖 Generated by Copilot at 3612b5b

To make FsAutoComplete faster and leaner
They added some packages and cleaned up the FSharpCompilerServiceChecker
They used spans and pools for strings and buffers
And tweaked the AdaptiveFSharpLspServer
Now it's a more efficient and robust code completer

🚀🐛🧹

WHY

These get called all the time, even while scrolling. While it's not a ton of savings compared to toher calls, it adds up. Didn't get rid of the URI LocalPath allocation because that's way to much work while this was a relatively simple switch to spans.

HOW

🤖 Generated by Copilot at 3612b5b

• Remove unnecessary thread switching in compiler service methods (link, link, link, link, link, link, link, link)
• Add error logging to TryGetRecentCheckResultsForFile method (link)
• Add LinkDotNet.StringBuilder and CommunityToolkit.HighPerformance packages to improve performance and memory efficiency (link, link, link)
• Use ReadOnlySpan<char> and ValueStringBuilder types to avoid string allocations and optimize path and uri manipulation in Utils.fs (link, link, link, link)
• Use SpanOwner type to manage memory buffers in AdaptiveFSharpLspServer.fs (link)
• Use custom ThrottleBy extension method to group and delay analyzer execution in AdaptiveFSharpLspServer.fs (link)
• Modify log level and context in parseAndCheckFile function in AdaptiveFSharpLspServer.fs (link)
• Avoid redundant async operation in forceGetTypeCheckResultsStale function in AdaptiveFSharpLspServer.fs (link)
• Delete temporary file after executing command in handleCommandEvents function in AdaptiveFSharpLspServer.fs (link)
• Comment out debug logging in FileSystem.fs to reduce verbosity and string allocations (link, link)
• Add code to playground.fsx for testing custom computation expression builder (link)

[TheAngryByrd]

These logging functions can get called a lot and do actually allocate so commented out for now.

We'll work on some lower allocation solution later.

[smoothdeveloper]

let inline debug a b c = ()

let foo () =
  debug 1 (2+2) 4

it seems the compiler is optimizing this, wondering if this can be used to make the debug function a no-op in release builds while keeping the code around for debug builds?

[smoothdeveloper]

I guess no:

let inline debug a b c = ()

let foo () =
  debug (new obj()) (new obj()) (new obj())

it doesn't get elided.

[TheAngryByrd]

could always ifdef them i guess

[baronfel]