Hi I tried to build my application with Xcode 12. I have struggled with a bad problem which is very very slow to build or index to my app. I looked the 'show the report navigator' tab and build messages and I find Compile swift source files(x86_64) 300.3 seconds Precompiling bridging header (x86_64) Compile AAA.swift (x86_64) Merge swiftmodule (x86_64) the 'Merge swiftmodule' process is especially slow. There are any document or tips I can fix it ? Please let me know how to improve and why it occur. thanks.

Hi I have joined an iOS development team about 3 month ago. When I run the code, It takes too long time to build. Even though in the incremental build time too. It needs about 2 minutes to run every single time. I have tried to find why it is too slow and I guess the amount of swift code file is. There are 4,000 swift code files and the dependency is very complicated. So... In a short, the number of source files can make build slower? Please save me! Thanks!

I have some questions to apple team. Too many swift file can make build time slow? There is a large file like a kind of UIViewController. it confirms to a lot of protocol. like UICollectionViewDataSource, UICollectionViewDelegate and some one. Which one better? first, Just write it down one file or divide it into separated files to confirm each protocol. Thanks!