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..85377c54be68d93271d6543565141f28e1b6c31c 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -1519,8 +1519,9 @@ class Heap {
       8 * (Page::kPageSize > MB ? Page::kPageSize : MB);
 
   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_generation_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 +1887,8 @@ class Heap {
   intptr_t max_executable_size_;
   intptr_t maximum_committed_;
 
+  int old_generation_growing_factor_;

[Michael Starzinger, 2014/04/15 12:11:50]

nit: Can we haz short comment of the semantics?

+
   // For keeping track of how much data has survived
   // scavenge since last new space expansion.
   int survived_since_last_expansion_;