Disable parallel GC by default
Not using parallel GC seems to reduce avg pauses by ~0.1s on
EvaluateAndApplyChanges. Avoiding creating the thread pool should
help app launch slightly and reduce memory ussage.
Change-Id: Iebec2a17701c76e4145b41d7c0b4f6dd17806efa
diff --git a/runtime/gc/heap.h b/runtime/gc/heap.h
index 2f62798..066b4c5 100644
--- a/runtime/gc/heap.h
+++ b/runtime/gc/heap.h
@@ -145,6 +145,8 @@
static constexpr double kDefaultHeapGrowthMultiplier = 2.0;
// Primitive arrays larger than this size are put in the large object space.
static constexpr size_t kDefaultLargeObjectThreshold = 3 * kPageSize;
+ // Whether or not parallel GC is enabled. If not, then we never create the thread pool.
+ static constexpr bool kDefaultEnableParallelGC = false;
// Whether or not we use the free list large object space. Only use it if USE_ART_LOW_4G_ALLOCATOR
// since this means that we have to use the slow msync loop in MemMap::MapAnonymous.