Embedded development, image manipulation, network protocols, parsing binary files...
Thanks for answering!
I’m sure you’re aware of all this and I don’t want to backseat drive/code. It’s just I was on a project once where microsecond latency mattered and it was written in Java, but with a custom String class and custom garbage collection (using a custom object pool instead of relying on JVM’s to avoid any GC halt, which would be intolerable). It was a really fun project tech wise, but at that point, C/C++ would have made wayyyyyy more sense and saved us a lot of headaches.
https://www.ptc.com/en/products/developer-tools/perc
https://www.aicas.com/cms/en/JamaicaVM
https://www-03.ibm.com/software/products/bg/real-time
Then there are the Java variants out of Mountain View, although Android's performance is not in the same league as those ones.
This are just the most well known ones, Java is not only the OpenJDK.
As for microsecond latency, I guess it matters a lot to the US military.
http://www.militaryaerospace.com/articles/2006/10/lockheed-m...
"PERC Ultra offered Lockheed Martin the responsiveness it needed to meet its most demanding timing requirements. In addition to real-time threading and deterministic garbage collection, PERC Ultra provided the instrumentation and VM management tools necessary to support the mission-critical real-time requirements of the Aegis Weapon System."
"The Lockheed Martin-developed Aegis Weapon System is the sea-based element of the U.S. Ballistic Missile Defense System. The Aegis Weapon System is a radar and missile system integrated with its own command and control system, capable of simultaneous operation defending against advanced air, surface, and subsurface threats."
Edited: but Yes, and they're not the only ones that did radar or embedded software with PERC. There was a time (5-10 years ago ?) it was all the rage...