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I really hope to see the SIMD vector related improvements come through, I know there are some independent JDK code bases that have more evolved SIMD support, bu

I really hope to see the SIMD vector related improvements come through, I know there are some independent JDK code bases that have more evolved SIMD support, but for a lot of big data processing tools, switching away from jdk based languages appears to be the way SIMD related performance improvements have been realized because of this missing crucial feature set. JDK 11 was when this stuff was first in development, and it's truthfully insane that it hasn't fully been released yet.

kaba0 4y ago
Most of these low-level APIs simply just wait for value types - they don’t want to hardcode something into the language, that might not be a perfect fit for those. Which makes sense, frankly.
- mike_hearn 4y ago
  Within limits. Valhalla seems to be still far from launching, and allowing features to back up behind it might just recreate the situation Java has previously found itself in during the 7/8 era where slippage in massive projects caused everything else to slip too. The new release cycle was meant to fix that, but if half the new stuff ends up waiting for value types then the problem has just reappeared in a new form. The odd thing is that part of Valhalla is about how to migrate existing types to being value types, and they already have code that can simulate the same restrictions. So it's not really clear why these features have to wait. Migration is a part of the Valhalla plan anyway.