I wrote my first iOS app in 2012 in Objective-C. Its total archive size including the app file, dSYMs file, etc. was less than 1 MB. I recently rewrote it in Swift with Xcode 9 and its archive size is now 160 MB. What is taking up all the space? It's not my code, because the Swift code is very similar to the Objective-C code and is actually a fair amount smaller.
I'm using Google Maps in another app and noticed the archive size is almost a half GB. I thought maybe the Google Maps libraries were taking up all the space until I noticed that all my recent Swift apps are very large as well. My related question is: If I'm enabling Bitcode (as is required), and my .app file size is 200 MB, how much of that is actually downloaded on the user's iPhone?