My point was that the C++ version had been tuned over several years to get as much performance as it could. Replicating the C++ code in java wasn't the optimal

My point was that the C++ version had been tuned over several years to get as much performance as it could. Replicating the C++ code in java wasn't the optimal strategy for performance in java, but it was the optimal strategy for getting the correct results. There are many optimizations I could have gotten by rewriting the java code in a manner that took better advantage of java's strengths, but alas the project is in other hands now....