Revert "Grow big old generation slower.", tanks SplayHarder.

src/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_H_
 #define V8_HEAP_H_
 
 #include <cmath>
 
 #include "src/allocation.h"
@@ skipping 1056 matching lines @@
   static const int kMaxExecutableSizeLowMemoryDevice =
       128 * kPointerMultiplier;
   static const int kMaxExecutableSizeMediumMemoryDevice =
       256 * kPointerMultiplier;
   static const int kMaxExecutableSizeHighMemoryDevice =
       512 * kPointerMultiplier;
   static const int kMaxExecutableSizeHugeMemoryDevice =
       700 * kPointerMultiplier;
 
   intptr_t OldGenerationAllocationLimit(intptr_t old_gen_size) {
-    intptr_t limit;
-    if (FLAG_stress_compaction) {
-      limit = old_gen_size + old_gen_size / 10;
-    } else if (old_gen_size < max_old_generation_size_ / 8) {
-      if (max_old_generation_size_ <= kMaxOldSpaceSizeMediumMemoryDevice) {
-        limit = old_gen_size * 2;
-      } else {
-        limit = old_gen_size * 4;
-      }
-    } else if (old_gen_size < max_old_generation_size_ / 4) {
-      limit = static_cast<intptr_t>(old_gen_size * 1.5);
-    } else if (old_gen_size < max_old_generation_size_ / 2) {
-      limit = static_cast<intptr_t>(old_gen_size * 1.2);
-    } else {
-      limit = static_cast<intptr_t>(old_gen_size * 1.1);
-    }
-
+    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;
     return Min(limit, halfway_to_the_max);
   }
 
   // Indicates whether inline bump-pointer allocation has been disabled.
   bool inline_allocation_disabled() { return inline_allocation_disabled_; }
 
   // Switch whether inline bump-pointer allocation should be used.
@@ skipping 404 matching lines @@
   Object* roots_[kRootListLength];
 
   size_t code_range_size_;
   int reserved_semispace_size_;
   int max_semi_space_size_;
   int initial_semispace_size_;
   intptr_t max_old_generation_size_;
   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_;
 
   // For keeping track on when to flush RegExp code.
   int sweep_generation_;
 
   int always_allocate_scope_depth_;
   int linear_allocation_scope_depth_;
 
@@ skipping 1253 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_