Yeah, modern JVM is a true miracle and you can be x5 productive (and safe!) compared to C/C++
Do you have any recommendations for a low latency work queue (with in a jvm)?
I want to spawn millions of micro-second-tasks per second, to worker cores..
I am on a massive cache CPU so memory latency hasnt raised its ugly head yet
EDIT: not LMAX please...
The DiamondQueue should be soon available for free at the CoralQueue project on GitHub.
I toyed around the ring buffer pattern a decade ago, creating a unicast one (using CAS on entries, and eventually a logarithmic scan for next readable entry, not to brute-force-scan them all), but I'm not sure that its latency is much better than that of a regular ThreadPoolExecutor (the throughput could be better though).
Latency also depends on whether it spins or blocks when waiting for a slot to read or write.
If you want to give it a try: https://github.com/jeffhain/jodk/blob/master/src/net/jodk/th...