ParNew 4x slower under 1.7 vs 1.6?

[Holger Hoffstätte]

On 09/14/13 15:39, Andrew Mulholland wrote:
> It is our belief that r3670, which adds a finalizer method to the
> Unmarshaller (which was an attempted fix for
> https://java.net/jira/browse/JAXB-831 ) is the change which causes this
> behavior.

Are you setting -XX:+ParallelRefProcEnabled ? If not, give it a try.
It's off by default, which frequently causes problems with many weak
references. Ultimately the problem is that JAXB - like many other IMHO
broken libraries - exposes no explicit resource management or lifecycle
control mechanisms, and passively relies on mostly nondeterministic GC
behaviour.

-h