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The JavaFX script compiler is still a work in progress, but here's an very basic implementation of the Bubblemark application using it.
We're still working on implementing the full JavaFX script runtime with the compiler. The above version is just using a provisional runtime and is just animating an image and doesn't implement the "bubbles" with vector graphics.
However, even so, the footprint and performance is now on par with what you should expect from the eventual production quality JavaFX script implementation.
Note: on some systems OS-level timer-resolution will limit your fps. E.g. you'll see a max of 64 fps for any of the bubblemark examples.