Java has been broadly used in HPC and low-latency trading software for years now. That's not only because much more attractive time-to-market but also because in many cases Java is on par with c/cpp when it comes to performance. Sometimes even better.

I'm under the impression that you are not interested in educating yourself on the topic, however if I'm mistaken, have a look at some reasons why Java can be as fast or faster than c/cpp:

- TLAB (thread-local allocation buffer)

- Escape analysis

- Mono- and bi-morphic callsite optimizations

- JIT in general (dead code elimination, implicit null checks, CHA-based optimizations, etc).

Also, you don't have to use Oracle JVMs. There's IBM's J9, OpenJDK-based Zulu, or commercial JVM from Azul (Zing).

I've used Java in the enterprise plenty. Not a fan. And no, it's really never faster than properly written C/C++.

And no, the actual HFT stuff is written in C++.

> And no, the actual HFT stuff is written in C++

This is how I know you have no idea what you're talking about.

Source: been working on low-latency HFT Java apps for shops like Goldman Sachs, Morgan Stanley, UBS and others for 10+ years.

Not going to reply any more. Not worth it.

Of course you have.

Not worth it, indeed.