Three benchmarks reproduced regressions in 10-b34. These benchmarks all use G1. Running the same benchmarks with 10-b34 while using ParallelGC show no regression.

SPECjvm98-Server.jack approx -15 to -18% on LXS (very large)
                                           approx -3% on STS
                                           approx -8% on MXS

SPECjvm98-Server.jess approx -4% on LXS (large)

Tools-Javadoc-Steady approx -1 to -2% on LXS

Note that the SPECjvm98-Server.jack on LXS regression is very large!