This is still far longer than it should be. I just built a not-particularly-large app after making a single-line change and it took 16 seconds to compile, dex,

This is still far longer than it should be. I just built a not-particularly-large app after making a single-line change and it took 16 seconds to compile, dex, package and install on a running x86 emulator. The installation time is appreciable (4 seconds for my 10MB APK), which would be cut to zero for a simulator. Similarly, removing the dexing and packaging would be a great help. I'm jealous when I see how fast my iOS colleagues can make code tweaks and see them running on a simulator one second later.