Edits can cause a big increase in IntelliSense update time (until a save occurs)

[sean-mcmanus]

I have a repro with 3.2k functions that each calls another function (generated with the help of Copilot), and after just 4 edits it starts taking around 8 times as long to update the TU. I don't repro the same behavior in VS. The processing time goes down to the original update time after a save.

It seems to repro for all TUs in general after enough edits are made, but the particular repro case seems like a "worst case" for some reason.

[heartacker]

yes. slow here