| Index: src/flag-definitions.h | 
| diff --git a/src/flag-definitions.h b/src/flag-definitions.h | 
| index 256e7c7736e7c178880bcd3f0729afcae5277278..8306f318f2f52887140ae35acf8d68294eaeda43 100644 | 
| --- a/src/flag-definitions.h | 
| +++ b/src/flag-definitions.h | 
| @@ -688,7 +688,7 @@ DEFINE_INT(min_progress_during_incremental_marking_finalization, 32, | 
| "least this many unmarked objects") | 
| DEFINE_INT(max_incremental_marking_finalization_rounds, 3, | 
| "at most try this many times to finalize incremental marking") | 
| -DEFINE_BOOL(black_allocation, false, "use black allocation") | 
| +DEFINE_BOOL(black_allocation, true, "use black allocation") | 
| DEFINE_BOOL(concurrent_sweeping, true, "use concurrent sweeping") | 
| DEFINE_BOOL(parallel_compaction, true, "use parallel compaction") | 
| DEFINE_BOOL(parallel_pointer_update, true, | 
|  |