There seem to be measurements in the slides I reference, so it wasn't exactly "future work". But of course it sucks that this work is not yet publicly available (AFAIK), probably due to not being 100% production ready yet. But I'm sure it's getting there.
Here's an old slidedeck that talks about it: http://www.oracle.com/technetwork/java/jvmls2013wimmer-20140...