> There are HFT systems using Java, few were on HN even. The HFT systems I know about in Java are mostly not recognizable as Java to most Java programmers. The

> There are HFT systems using Java, few were on HN even. The HFT systems I know about in Java are mostly not recognizable as Java to most Java programmers. They use static allocation of all data making sure that there is no risk of a GC interrupt and have a fixed set of threads that have assigned cores. It is sometimes a reasonable way to build a system, but very seldom.