This doesn't make much sense. Using object pools and and off-heap data structures doesn't warp the code that much, if at all. You still end up with pretty much all clean, simple Java code.

I've seen (10+ years old) low-latency Java apps where people avoid using any OO (ie everything is static methods)... and even then the code was still often easier to maintain and understand than equivalent C++ applications. Nobody does this any more anyways.