JDK-8355513 : Performance evaluation for Compact Object Headers
  • Type: Sub-task
  • Component: hotspot
  • Sub-Component: runtime
  • Priority: P4
  • Status: Closed
  • Resolution: Delivered
  • Submitted: 2025-04-24
  • Updated: 2025-06-24
  • Resolved: 2025-06-24
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tbdResolved
Description
In the comments, I noted the performance of turning on UseCompactObject headers but this should be elevated to a subtask.  Also these numbers were from before JDK-8339114 was fixed so may need to be redone.

https://bugs.openjdk.org/browse/JDK-8350457?focusedId=14765100&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-14765100
Comments
Performance was delivered.
24-06-2025
Roman wasn't a watcher of this sub-task so I added him ...
04-06-2025
Yes. I think it could be closed as delivered. Minor performance regression (which are under investigation now) were expected.
02-06-2025
https://cr.openjdk.org/~skuksenko/jep519/performance.txt
02-06-2025
[~skuksenko] Can we close this as delivered? You had some data that you gathered but is it in a different CR?
02-06-2025