RFR: 8305895: Implement JEP 450: Compact Object Headers (Experimental) [v21]

Thu Sep 19 12:38:48 UTC 2024

On Thu, 19 Sep 2024 11:47:21 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> It lessens the cache effects of Klass hyperaligning.
>
> Note that if we go with my KLUT proposal for post-Lilliput (the GC oop iteration improvements), this will not matter anymore and can be simplified to a fixed shift of 10.

Yes, please, not having this code would be really nice.  This is difficult code.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/20677#discussion_r1766753081