Spike: Investigate using webworker for Python discovery

[karrtikr]

#15813

[Frnchy1]

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________________________________ From: Kartik Raj ***@***.***> Sent: Thursday, August 3, 2023 8:24:15 PM To: microsoft/vscode-python ***@***.***> Cc: Subscribed ***@***.***> Subject: [microsoft/vscode-python] Spike: Investigate using webworker for Python discovery (Issue #21755) — Reply to this email directly, view it on GitHub<#21755>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A7O3GJG7CF6WBWTTNNYX3ODXTQ6K7ANCNFSM6AAAAAA3DPP5AY>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[karrtikr]

Spike

Discovery = locator + watcher + resolver

vscode module is not available to use in worker threads, so we have to refactor them out. APIs we currently use:

• Locator requires workspace.workspaceFolders and workspace.onDidChangeWorkspaceFolders
• Watcher requires workspace.createFileSystemWatcher, EventEmitter, RelativePattern
• Uri itself
• ...maybe more

Resolver & locator part are expensive, watcher can be outside. The issue right now is watcher is part of the locator, locator gives out existing environment locations and watcher returns whether there's an new env in those locations.