RFR: 8335480: Only deoptimize threads if needed when closing shared arena [v2]

[Jorn Vernee]

On Mon, 15 Jul 2024 09:02:29 GMT, Uwe Schindler <uschindler at openjdk.org> wrote:

> Of course we can do that in a separate thread (this is my idea how to improve the closes in lucene).

This is what I was thinking of as well. `close()` on a shared arena can be called by any thread, so it would be possible to have an executor service with 1-n threads that is dedicated to closing memory.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/20158#issuecomment-2228215031