[iainmerrick]

That seems like a useful engineering problem for Facebook to try to solve, rather than this bullshit rocket science optimization stuff that adds yet more complexity for only incremental gains.

[pcwalton]

Compiler optimizations are not "bullshit rocket science optimization". You depend on them every day.

None of the optimizations in this tool are "rocket science" compared to the optimizations that GCC, for example, does.

[iainmerrick]

Right, so on Android if you need code to be fast, write it in C++.

If you have a ridiculously bloated and buggy Java app, writing an optimizing compiler doesn't sound like the most effective solution.

[spacemanmatt]

My take: If you can't write it fast enough in Java, it is probably not a good mobile app candidate in the first place. The Dalvik optimizer and the JIT yield a regularly reasonable experience for me.