Programming Techniques for High Throughput and Low Latency
Java Garbage Collector tuning for sub-millisecond Stop-The-World pauses (Shenandoah GC)
In the most performance-critical parts, consideration of runtime details such as CPU architectures, Java Memory Model and GC details
Out-of-thin-air Safety, RRWL, SpinLocks, Unsafe, Memory Fences, Zero Garbage, …