PC emulators by nature are slow. Layer on top of that an emulator written to run in a managed environment such as java and they are *really* slow. So the question I had when first reading the title of the chapter is why? Why would anyone want to do this? One of the core performance metrics of any emulator is performance. That is of course the target of emulation is something comparable to the current applications being run on the native hardware (ie you are not emulating an original Nintendo Entertainment System using a quad core 3GHz Xeon processor).
I will admit though the authors make a pretty good case (although I am still not sure I am fully a believer). I did like some of the discussion on the performance challenges the authors faced specifically in regards to the complexities of class loading and the processor protected mode/memory performance bottlenecks.
All in all it was interesting learning about the platform and the java performance tips that were shared. But my question still stands … is it useful for anything other than research? What do you think?
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