@xta0 Thanks for info. Besides comparing .a file sizes I also checked size as described here:https://stackoverflow.com/questions/32003262/find-size-contributed-by-each-external-library-on-ios/39593377 7
Both ways gave insignificant difference. I tried also with -dead_strip but seams XCode is already doing it.
After that I tried simply comparing final .ipa files and result was as expected, about 40% decrease in size.