Do you think that the following JRuby options are sensible ones:
```
ENV JRUBY_OPTS="--server -J-XshowSettings:vm -Xcompile.invokedynamic=true -Xcompile.fastest=true -Xcompile.fastsend=true -Xcompile.mode=FORCE -Xinvokedynamic.all=true -Xthread.pool.min=4"
```