RFC: Epsilon GC JEP

[Aleksey Shipilev]

Hi,

I would like to solicit feedback on Epsilon GC JEP:
  https://bugs.openjdk.java.net/browse/JDK-8174901
  http://openjdk.java.net/jeps/8174901

The JEP text should be pretty self-contained, but we can certainly add more
points after the discussion happens.

For the last few months, there were quite a few instances where Epsilon proved a
good vehicle to do GC performance research, especially on object locality and
code generation fronts. I think it also serves as the trivial target for
Erik's/Roman's GC interface work.

The implementation and tests are there in the Sandbox, for those who are curious.

Thanks,
-Aleksey

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