Xcode 4.0.1 was released a few days ago, which means that I am once again downloading the 4.5 GB beast to update. Does anyone know if Apple plans to introduce a better update system?
Since 4.3 the whole Xcode toolchain is bundled into a single Mac App Store application. The Mac App Store supports delta updates and the update to 4.3.1 that I’m downloading right now is ~900M, compared to ~1.5G for the whole app. So it looks like the update sizes are finally coming down, if slowly.