RFR: 8209120: Archive the Integer.IntegerCache

[Stephen Colebourne]

On 9 August 2018 at 12:33, Claes Redestad <claes.redestad at oracle.com> wrote:
> using the new ability to archive immutable heap graphs into the CDS archive,
> even archiving small things like the Integer.IntegerCache can be profitable.

Interesting. I did consider caching some instances of `LocalDate` when
I was developing JSR-310 (say 1 year either side of the current date
at startup). Maybe an avenue to investigate in the future!

thanks
Stephen


>
> Webrev: http://cr.openjdk.java.net/~redestad/8209120/open.00/
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8209120
>
> For a default cache (256 elements), this change saves us ~1 million
> instructions. Applications that use -XX:AutoBoxCacheMax can profit further
> (and we can use this to stress test the archiving feature..)
>
> The patch is built on top of and tested with Jiangli's patch for
> https://bugs.openjdk.java.net/browse/JDK-8207263 and I don't intent to push
> this before that is in.
>
> Thanks!
>
> /Claes
>