Xcode 11.0 beta 2 is very unresponsive

Could be either:

- it uses much more resource (memory) than before, and reches you Mac limits

- or just a ß problem (but a lot of others would have complained).

Not directly related to build times, but, for what it's worth, make sure you're not saving your projects in the default 'Documents' folder. The beta seems to spend a great deal of time fighting file syncronization associated with iCloud if you do that. I started saving projects to a non-sync'd folder and XCode returned to its normal (pre-beta) performance levels.