One thing to keep in mind is that OpenJDK is different from Dalvik, and their JITs are very different. Dalvik optimizes more heavily in favour of memory space

One thing to keep in mind is that OpenJDK is different from Dalvik, and their JITs are very different. Dalvik optimizes more heavily in favour of memory space (one of the reasons for its tracing JIT approach as opposed to method JIT approach). Indeed, on the desktop, Java does very well on a lot of these benchmarks. My goal with these measurements, though, was to get an idea of what kind of performance could be expected by people who were writing asm.js code for Firefox OS devices, and how it compares to performance of similar code on other mobile platforms.