RFR: 8209120: Archive the Integer.IntegerCache

Alan Bateman Alan.Bateman at oracle.com
Thu Aug 9 11:41:27 UTC 2018

On 09/08/2018 12:33, 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.
Nice! What would you think about testing a test to at least exercise 
combinations of AutoBoxCacheMax at dump time and run time.


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