SebastianVerified account

Daemon is only really useful if you're working on an application though where you're calling it VERY often and don't care about additional memory usage. Super useful for IDE integration too where you need instant feedback.

Being able to keep long-lived memory cache is useful, especially when you're performing multiple computations on a file. You can store ASTs in memory and then caching it in a bunch of places with weak maps.

Also more context on what is actually being “memory cached”: Only the formatted code and errors for each file are cached. We are still computing all the possible files, filtering them with globs, talking to the workers to get their cached value, and printing it all.