[heap] Eagerly unlink empty kHuge category from free list

src/heap/spaces.cc

 // Copyright 2011 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.
 
 #include "src/heap/spaces.h"
 
 #include "src/base/bits.h"
 #include "src/base/platform/platform.h"
 #include "src/base/platform/semaphore.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 2343 matching lines @@
   FreeSpace* node = nullptr;
   while (it.HasNext()) {
     FreeListCategory* current = it.Next();
     node = current->SearchForNodeInList(minimum_size, node_size);
     if (node != nullptr) {
       Page::FromAddress(node->address())
           ->add_available_in_free_list(-(*node_size));
       DCHECK(IsVeryLong() || Available() == SumFreeLists());
       return node;
     }
+    if (current->is_empty()) {
+      RemoveCategory(current);
+    }
   }
   return node;
 }
 
 FreeSpace* FreeList::FindNodeFor(int size_in_bytes, int* node_size) {
   FreeSpace* node = nullptr;
 
   // First try the allocation fast path: try to allocate the minimum element
   // size of a free list category. This operation is constant time.
   FreeListCategoryType type =
@@ skipping 846 matching lines @@
     object->ShortPrint();
     PrintF("\n");
   }
   printf(" --------------------------------------\n");
   printf(" Marked: %x, LiveCount: %x\n", mark_size, LiveBytes());
 }
 
 #endif  // DEBUG
 }  // namespace internal
 }  // namespace v8