[wbond]

How big is the app you are working on? How long does an incremental build take including linking and signing?

30 incremental builds an hour sounds pretty high to me, unless you’ve got a smaller app. On Intel machines, I’ve been seeing minimal incremental build times of over a minute. The M1 obviously make some pretty significant improvements in this situation.

However, while I’m relatively new to the iOS world, it seems linker performance is a fairly hot topic. I know more than a few people are eyeing support for Mach-O linking in mold, based on the massive speedups shown for Linux.

[omegalulw]

It really depends in coding style. For example, I always like to write the smallest possible change to address a feature and bug fix that's testable, then I start writing unit tests, then back to code, then back to unit tests and so on. So it's not uncommon to do a lot of incremental builds (but yeah 30/hour is on the high side). Sometimes this is not feasible, e.g. working on a complex component which has a simple public API but does a lot of heavy lifting internally - in that case it takes a while to get to a testable change.