Grow old generation slower on low-memory devices.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 1f7526e71a58e146706c9b6922ab40c25164e457..ee8b6ff5fc07f0d8b6e17bf8e7768cb1455cf3cc 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -1518,9 +1518,28 @@ class Heap {
   static const intptr_t kMinimumOldGenerationAllocationLimit =
       8 * (Page::kPageSize > MB ? Page::kPageSize : MB);
 
+  // The new space size has to be a power of 2.
+  static const int kMaxNewSpaceSizeLowMemoryDevice = 2;
+  static const int kMaxNewSpaceSizeMediumMemoryDevice = 8;
+  static const int kMaxNewSpaceSizeHighMemoryDevice = 16;
+  static const int kMaxNewSpaceSizeHugeMemoryDevice = 16;
+
+  // The old space size has to be a multiple of Page::kPageSize.
+  static const int kMaxOldSpaceSizeLowMemoryDevice = 128;
+  static const int kMaxOldSpaceSizeMediumMemoryDevice = 256;
+  static const int kMaxOldSpaceSizeHighMemoryDevice = 512;
+  static const int kMaxOldSpaceSizeHugeMemoryDevice = 700;
+
+  // The executable size has to be a multiple of Page::kPageSize.
+  static const int kMaxExecutableSizeLowMemoryDevice = 128;
+  static const int kMaxExecutableSizeMediumMemoryDevice = 256;
+  static const int kMaxExecutableSizeHighMemoryDevice = 512;
+  static const int kMaxExecutableSizeHugeMemoryDevice = 700;
+
   intptr_t OldGenerationAllocationLimit(intptr_t old_gen_size) {
-    intptr_t limit = FLAG_stress_compaction ?
-        old_gen_size + old_gen_size / 10 : old_gen_size * 4;
+    intptr_t limit = FLAG_stress_compaction
+        ? old_gen_size + old_gen_size / 10
+        : old_gen_size * old_space_growing_factor_;
     limit = Max(limit, kMinimumOldGenerationAllocationLimit);
     limit += new_space_.Capacity();
     intptr_t halfway_to_the_max = (old_gen_size + max_old_generation_size_) / 2;
@@ -1886,6 +1905,11 @@ class Heap {
   intptr_t max_executable_size_;
   intptr_t maximum_committed_;
 
+  // The old space growing factor is used in the old space heap growing
+  // strategy. The new old space size is the current old space size times
+  // old_space_growing_factor_.
+  int old_space_growing_factor_;
+
   // For keeping track of how much data has survived
   // scavenge since last new space expansion.
   int survived_since_last_expansion_;