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

[David Holmes]

On Thu, 23 Feb 2023 12:44:37 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> src/hotspot/share/classfile/systemDictionary.cpp line 1489:
>> 
>>> 1487:   }
>>> 1488: 
>>> 1489:   // Add the new class. We need recompile lock during update of CHA.
>> 
>> This comment belongs after `add_to_hierarchy`.
>
> 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.

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