I have enabled bit code in my iOS app and size has increased 3x times when archive was uploaded to iTunes. I am wondering if I the same 3x size will show on App store aswell
It should be the case, yes. But I don't think it is :(
Sometimes the same binary with bitcode enabled would be 3x the original size, sometimes the binary slicing will actually work and decrease the overall binary size as it is supposed to do.
https://forums.developer.apple.com/thread/25972
I think it's safer if you don't use bitcode for now, until we know for sure that Apple fixed this. I'll try to dig deeper.