RFR: 8349400: Improve startup speed via eliminating nested classes

Sat Feb 8 09:29:09 UTC 2025

On Fri, 7 Feb 2025 01:46:03 GMT, Valerie Peng <valeriep at openjdk.org> wrote:

> > The reproducer you provided doesn't try to load KnownOIDs on my machine. What am I missing?
> > Other than that, the change looks reasonable to me.
> 
> Me neither and I'm using linux. Are you sure the Startup.java is right? Just curious, do you have a percentage on how much performance difference you observe with this? How about differences in memory usage, is there any?

You are right. Class KnownOIDs are loaded during startup because it is started in IntelliJ IDE and there is an agent.

git/jdk/build/macosx-aarch64-server-fastdebug/images/jdk/bin/java -verbose:class -javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=58735:/Applications/IntelliJ IDEA.app/Contents/bin

Therefore, this is not a problem with the default JVM startup parameters, but a problem with the Agent scenario.

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PR Comment: https://git.openjdk.org/jdk/pull/23411#issuecomment-2644744352