Hi Matthew, On the topic of documents with indications for improving performance.
Don't know if you already found it, but there is a draft here (to which I've made a small contribution): https://wiki.openjdk.java.net/display/OpenJFX/Performance+Tips+and+Tricks A bit old though... And here: https://wiki.openjdk.java.net/display/OpenJFX/Performance+Ideas -- Pedro Duque Vieira
