diff --git a/runtime/gc/heap.h b/runtime/gc/heap.h
index 8f85c7b..ebbb843 100644
--- a/runtime/gc/heap.h
+++ b/runtime/gc/heap.h
@@ -142,7 +142,7 @@
   static constexpr size_t kDefaultLongPauseLogThreshold = MsToNs(5);
   static constexpr size_t kDefaultLongGCLogThreshold = MsToNs(100);
   static constexpr size_t kDefaultTLABSize = 32 * KB;
-  static constexpr double kDefaultTargetUtilization = 0.5;
+  static constexpr double kDefaultTargetUtilization = 0.75;
   static constexpr double kDefaultHeapGrowthMultiplier = 2.0;
   // Primitive arrays larger than this size are put in the large object space.
   static constexpr size_t kMinLargeObjectThreshold = 3 * kPageSize;