There has been a noticeable dip in bloat performance (was hovering around 96-98%, now around 90-92%). See attached graph, available at  if you're lucky.
On close inspection, the dip occurred between performance runs 6694 & 6699, which points to the commits 15225-15227.
15225: Switch use of StringBuffer to StringBuilder
15226: RVM-725 - Increase command line options for tuning opt compiler behaviour Complete WIP: make naming of opt compiler options more regular. Introduce options for local expression folding and tableswitch conversion.
15227: RVM-725 - Increase command line options for tuning opt compiler behaviour Complete WIP: introduce new options to control bonuses given to reduce the method size when particular arguments are passed to a method being considered for inlining.