RFR: 8209120: Archive the Integer.IntegerCache

Jiangli Zhou jiangli.zhou at oracle.com
Thu Aug 9 16:12:34 UTC 2018

Hi Claes,

The change on the VM side looks good! Hope to see more graphs like this 
in the initial java heap being discovered and archived.



On 8/9/18 4:33 AM, Claes Redestad wrote:
> Hi,
> using the new ability to archive immutable heap graphs into the CDS 
> archive, even archiving small things like the Integer.IntegerCache can 
> be profitable.
> 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

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