Get rid of JSArray::Expand and friends

src/objects-inl.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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 6927 matching lines @@
 
 
 int Map::SlackForArraySize(int old_size, int size_limit) {
   const int max_slack = size_limit - old_size;
   CHECK(max_slack >= 0);
   if (old_size < 4) return Min(max_slack, 1);
   return Min(max_slack, old_size / 2);
 }
 
 
-void JSArray::EnsureSize(Handle<JSArray> array, int required_size) {
-  DCHECK(array->HasFastSmiOrObjectElements());
-  Handle<FixedArray> elts = handle(FixedArray::cast(array->elements()));
-  const int kArraySizeThatFitsComfortablyInNewSpace = 128;
-  if (elts->length() < required_size) {
-    // Doubling in size would be overkill, but leave some slack to avoid
-    // constantly growing.
-    Expand(array, required_size + (required_size >> 3));
-    // It's a performance benefit to keep a frequently used array in new-space.
-  } else if (!array->GetHeap()->new_space()->Contains(*elts) &&
-             required_size < kArraySizeThatFitsComfortablyInNewSpace) {
-    // Expand will allocate a new backing store in new space even if the size
-    // we asked for isn't larger than what we had before.
-    Expand(array, required_size);
-  }
-}
-
-
 void JSArray::set_length(Smi* length) {
   // Don't need a write barrier for a Smi.
   set_length(static_cast<Object*>(length), SKIP_WRITE_BARRIER);
 }
 
 
 bool JSArray::SetLengthWouldNormalize(Heap* heap, uint32_t new_length) {
   // If the new array won't fit in a some non-trivial fraction of the max old
   // space size, then force it to go dictionary mode.
   uint32_t max_fast_array_size =
@@ skipping 345 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_