On: Xcode 8.3 produces binaries 3x larger than Xcode 8...

[izacus]

For comparison - GMail app on my Pixel XL takes 31MB for the app and about 10MB for data and cache.

[JeremyBanks → izacus]

That's more due to Google offloading common logic into shared Android and Play components than compiler efficiencies.

[izacus → JeremyBanks]

Erm, that's not true. As soon as GMail app updates on Android, it replaces the builtin one with full features. The shared "Play components" are things like push handling, which is builtin on iOS as well.

Play services and OS do not carry GMail shared components.