This cannot be emphasized enough. High-performance algorithms are constrained by memory latency/bandwidth and the CPU caches. Java, with its large per-object sp

This cannot be emphasized enough. High-performance algorithms are constrained by memory latency/bandwidth and the CPU caches. Java, with its large per-object space overhead is not well suited for this. You need special case libraries to get the same performance, and in many cases you can just as well use modern C++.