RFR: 8305895: Implement JEP 450: Compact Object Headers (Experimental) [v8]

[Thomas Schatzl]

On Fri, 13 Sep 2024 12:48:53 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> If you've already fixed this for GC then I agree that we could remove this.
>
> This seems like something that should be done as a separate patch that gets pushed before this PR.

Will remove in JDK-8340119.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20677#discussion_r1758906485