There is 47% of max memory usage increase when running Controls.TableView-XmasTree benchmark.
Max memory usage for builds 410 and 411 is:
 410: ~330 Mb
 411: ~490 Mb

The cause is fix for RT-2844.
I did rollback the changes done in javafx-ui-common/src/com/sun/javafx/css/StyleManager.java
as part of fix for "RT-28447: set popup window scene stylesheet to that of the owner window's scene - this time with better checks on whether or not to clear style cache. " and max memory usage returned back.

There is no seems to be memory leak as no memory increase is observed as part of one test iteration
(or in other words as part of one Stage). The memory increase is observed on second and next iterations
which are ran in new Stages. Note, the previous Stage is released and all objects are supposed to be released as well.
However, I see the number of com.sun.javafx.css.StyleCacheEntry objects is in twice bigger which means
they are kept alive from previous iteration.

Steps to run Controls.TableView-XmasTree:
> cd JFX_WS/tests/performance/Controls/
> ant
> java -client -XX:+UseSerialGC -Xmx512m
       -cp "JFX_HOME/rt/lib/ext/jfxrt.jar;./dist/Controls.jar;../FXBenchmark/dist/FXBenchmark.jar;../../../import/benchmarks-2.1.1/benchmarks-2.1.1.jar"
       jrockit.bm.Main controls.bm.XmasTreeTableViewBenchmark -i 5 -wt 0 -tr 15
       -win-width 1280 -win-height 1024 -col-width 25 -row-height 10 -rows 90 -columns 50 -batch-size 10