How to handle large project sparsely populated with Lua files?

[ddickstein]

I have a workspace that's ~500K files (after accounting for workspace.ignoreDir that excludes the directories we know we want to ignore) but very sparsely populated with Lua files (~350). After about 14 seconds after the server starts up, I see the message warning me that over 100K files have been scanned. I'm a bit surprised by how long that takes, given that GNU find only takes 0.5s to find all of the Lua files. It's of course possible that the message isn't actually identifying where most of the time is going. How can I diagnose the problem here so that I can use the project's real root as the project root and not need to resort to some workaround like using a subdirectory that has most of the Lua files? Also, if I do need to use a subdirectory, how can I point to a .editorconfig in the actual workspace root?