We've made some "tweaks" and prepared pre-release 1.27.11988
I've made a quick video with just 5 workspace folders and 16k files (but I'll prepare a larger test soon); here is the whole loading: https://youtu.be/rgUEHjaDijI (it takes about 10 seconds on HDD to fully load)
So currently, I guess for 60k files, 30-40 seconds would be expected (and we'll be working on improving that).
Minutes would mean a bug.
Note: I'd recommend explicitly exclude "vendor" folder from being analyzed using
"php.problems.exclude" setting (https://docs.devsense.com/en/vscode/problems#phpproblemsexclude). Something like the following: