Hi, I've just filed https://bugs.openjdk.java.net/browse/RT-46214 but I wanted to post to the list asking if others have also observed this behavior.
The problem is the TreeTableView rebuilds its cell and rows on each and every add operation which naturally is not very effecient. Tom -- Thomas Schindl, CTO BestSolution.at EDV Systemhaus GmbH Eduard-Bodem-Gasse 5-7, A-6020 Innsbruck http://www.bestsolution.at/ Reg. Nr. FN 222302s am Firmenbuchgericht Innsbruck
