My understanding is that there's a pretty good proprietary JVM for ARM (optimising JIT and all), but that the FOSS stuff (including OpenJDK) is well behind, and as you say, can be expected to perform nowhere near as well as the AMD64 counterpart.
> Cross platform in theory, not so much in practice.
Optimistic that the OpenJDK folks would rise to the challenge if there was anything to play for. Writing a serious optimising JIT for modern ARM CPUs would doubtless be no small task, but wouldn't be breaking the mould. I believe it's a similar situation for RISC-V, currently.
Googles But wait, there's more! 'Graal'! Shiny new JIT engines are on the way, and ARM support is in there. Hopefully they'll perform well. [0] [1]
> Cross platform in theory, not so much in practice.
Optimistic that the OpenJDK folks would rise to the challenge if there was anything to play for. Writing a serious optimising JIT for modern ARM CPUs would doubtless be no small task, but wouldn't be breaking the mould. I believe it's a similar situation for RISC-V, currently.
Googles But wait, there's more! 'Graal'! Shiny new JIT engines are on the way, and ARM support is in there. Hopefully they'll perform well. [0] [1]
[0] https://github.com/oracle/graal/issues/632
[1] https://github.com/oracle/graal/pulls?utf8=%E2%9C%93&q=is%3A...