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I have a workspace that contains a static library and a project using the library, I’m then building the project (using Jenkins) to create an archive for ad-hoc distribution.
The resulting file size for the built library is reported as being 10.4Mb, yet .ipa is reported as being 4.2Mb.
How can the .ipa be so much smaller than the library, and yet the app runs when installed so it must be containing the library.
The most likely explanation is that the library contains symbols necessary to linking (as well as debugging symbols, possibly), while the ipa file has been already linked (thus it does not contains information for the linker) and stripped of debugging symbols.
On another account, the ipa file is just a zip file, so its content is also compressed.