Bump MaxRegularSpaceAllocationSize to InitialSemiSpaceSize() * 4/5

src/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 506 matching lines @@
   // we reserve twice the amount needed for those in order to ensure
   // that new space can be aligned to its size.
   intptr_t MaxReserved() {
     return 4 * reserved_semispace_size_ + max_old_generation_size_;
   }
   int MaxSemiSpaceSize() { return max_semispace_size_; }
   int ReservedSemiSpaceSize() { return reserved_semispace_size_; }
   int InitialSemiSpaceSize() { return initial_semispace_size_; }
   intptr_t MaxOldGenerationSize() { return max_old_generation_size_; }
   intptr_t MaxExecutableSize() { return max_executable_size_; }
-  int MaxRegularSpaceAllocationSize() { return InitialSemiSpaceSize() * 3/4; }
+  int MaxRegularSpaceAllocationSize() { return InitialSemiSpaceSize() * 4/5; }
 
   // Returns the capacity of the heap in bytes w/o growing. Heap grows when
   // more spaces are needed until it reaches the limit.
   intptr_t Capacity();
 
   // Returns the amount of memory currently committed for the heap.
   intptr_t CommittedMemory();
 
   // Returns the amount of executable memory currently committed for the heap.
   intptr_t CommittedMemoryExecutable();
@@ skipping 2521 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_