| Index: src/flag-definitions.h | 
| diff --git a/src/flag-definitions.h b/src/flag-definitions.h | 
| index a9bf40f8d8dfc08fcb0bf2492b424d96282bb81a..0d88d99fe05e9ce32e5388bfbb5d632a38d18143 100644 | 
| --- a/src/flag-definitions.h | 
| +++ b/src/flag-definitions.h | 
| @@ -674,7 +674,7 @@ DEFINE_INT(min_progress_during_incremental_marking_finalization, 32, | 
| DEFINE_INT(max_incremental_marking_finalization_rounds, 3, | 
| "at most try this many times to finalize incremental marking") | 
| DEFINE_BOOL(concurrent_sweeping, true, "use concurrent sweeping") | 
| -DEFINE_BOOL(parallel_compaction, false, "use parallel compaction") | 
| +DEFINE_BOOL(parallel_compaction, true, "use parallel compaction") | 
| DEFINE_BOOL(trace_incremental_marking, false, | 
| "trace progress of the incremental marking") | 
| DEFINE_BOOL(track_gc_object_stats, false, | 
|  |