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There have been Hotspot backends for ARM and AArch64 in OpenJDK for several versions now.

• chrisseaton 7y ago
  Depending who you talk to, you'll get the opinion that they're much lower quality than the AMD64 backends. I think that may be particularly an issue in Graal. Some people will tell you that the way Graal is designed is problematic for ARM and that's a long-term problem. I don't know if that's entirely true or not, but now we need it solved quickly if it is!
  • vbezhenar 7y ago
    I used to think that, but apparently nowadays ARM JVM is pretty good. Have no idea about Graal though (and I have no idea why would anyone need Graal at all).
    • chrisseaton 7y ago
      > I have no idea why would anyone need Graal at all It has new optimisations like partial escape analysis that C2 doesn't have. In production this saves Twitter 13% on compute resources in their data centre. That's MASSIVE. I presume it's tens of thousands of dollars a month. People also use Graal to compile Java applications to standalone native executables, which isn't something C2 can do. And finally Graal is a system that you can use to run languages other than Java. For example JavaScript on Graal, which runs on a JVM but is about as fast as V8.
      • jsjohnst 7y ago
        > I presume it's tens of thousands of dollars a month. You can probably add a zero, if not several more, assuming the 13% number is accurate.