RFR: 8300926: Several startup regressions ~6-70% in 21-b6 all platforms [v4]

[Robbin Ehn]

On Fri, 24 Feb 2023 02:45:58 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Not sure that make sense. Also we have no "recompile" lock.
>> I plainly removed this comment.
>
> "recompile" lock may have been a poor choice of words but the comment was describing why we need the Compile_lock when updating the dictionary.

The "add class" I interpret was for { add_to_hierarchy() + update_dictionary() } combo.
I thought maybe there use to be a recompile ? :)

Let me know if I should add back something?

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PR: https://git.openjdk.org/jdk/pull/12585