Jazelle accelerated bytecode interpreting (a bit) but modern JVMs spend nearly all their time running compiled code, so it doesn't really help and was abandoned

Jazelle accelerated bytecode interpreting (a bit) but modern JVMs spend nearly all their time running compiled code, so it doesn't really help and was abandoned. There are CPU HW features that Intel doesn't have which can benefit JVM workloads but they're all pretty obscure and aren't really Java specific.