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Not to mention that the demonstration I've seen of a sub microsecond trading platform was written in Java. and talking to my manager who used to be a developer

Not to mention that the demonstration I've seen of a sub microsecond trading platform was written in Java. and talking to my manager who used to be a developer in high-frequency trading - he tells me that's a pretty common language in that space. Which, I'll be honest, kind of blew my mind.

thefaux 2y ago
Yes, it is surprising initially but I can imagine that hft java coding conventions are very different from enterprise java.
bluGill 2y ago
Java, and even python are used in HFT, along with many other languages. Depending on the task they can work well or poorly. C++ has a good position in this space though because often you come down to a if(something){doTrade();} and java's optimizer has figured out that this if is normally false and so you pay a CPU branch missprediction penalty, while C++ had optimized for the true case and so when it matters is faster. No matter what the language used, HFT has some different programming styles vs normal.
- afdbcreid 2y ago
  > while C++ had optimized for the true case Which is why we have Profile Guided Optimization.
  - bluGill 2y ago
    Which is also what screws java as the runtime notices the false case is most common and so is willing to stall the pipeline when performance matters most.