Shenandoah on JDK11

[Aditya Mandaleeka]

Hi shenandoah-dev,

I'd like to understand the current state of Shenandoah on JDK11. I see that there is a backported version being maintained at shenandoah/jdk11 which is great (thank you!). I'm interested in specifically learning more about the following:

- How reliable/stable is this configuration today in your experience?
- What is the best way for a newcomer to track what has been backported and what hasn't?
- What do we know about the performance gap between shenandoah/jdk11 and Shenandoah on tip? I see that the "Shenandoah 2.0" barrier changes and extra word elimination have made it over to 11, but for other changes in Shenandoah (and its interactions with the rest of Hotspot) that can impact performance, is there an established way they are being analyzed and prioritized for backporting?

Thanks in advance for your time.

-Aditya