On Fri, 16 Feb 2024 01:23:42 GMT, Alex Menkov <amen...@openjdk.org> wrote:

> When I proposed this change 10 years ago, there was a push back: 
> https://bugs.openjdk.org/browse/JDK-8005604.

Right, the HPROF format was created to be independent of VM or any 
configuration. So JDK-8176520 is not really a bug, instead it is changing the 
meaning of the instance size field. Not opposed to doing that but I'm wondering 
if it means the version bytes at the start should be updated. I'm also 
wondering where the HPROF format is documented and if it now needs to be 
clarified. I think a CSR should be created to track this too.

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PR Comment: https://git.openjdk.org/jdk/pull/17855#issuecomment-1948610723

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