Remove some asserts to speed up debug mode.

src/heap.cc

Index: src/heap.cc
===================================================================
--- src/heap.cc	(revision 9581)
+++ src/heap.cc	(working copy)
@@ -1443,9 +1443,9 @@
                                     HeapObject** slot,
                                     HeapObject* object,
                                     int object_size) {
-    ASSERT((size_restriction != SMALL) ||
-           (object_size <= Page::kMaxHeapObjectSize));
-    ASSERT(object->Size() == object_size);
+    SLOW_ASSERT((size_restriction != SMALL) ||
+                (object_size <= Page::kMaxHeapObjectSize));
+    SLOW_ASSERT(object->Size() == object_size);
 
     Heap* heap = map->GetHeap();
     if (heap->ShouldBePromoted(object->address(), object_size)) {
@@ -1678,9 +1678,9 @@
 
 
 void Heap::ScavengeObjectSlow(HeapObject** p, HeapObject* object) {
-  ASSERT(HEAP->InFromSpace(object));
+  SLOW_ASSERT(HEAP->InFromSpace(object));
   MapWord first_word = object->map_word();
-  ASSERT(!first_word.IsForwardingAddress());
+  SLOW_ASSERT(!first_word.IsForwardingAddress());
   Map* map = first_word.ToMap();
   map->GetHeap()->DoScavengeObject(map, p, object);
 }
@@ -3688,7 +3688,7 @@
 MaybeObject* Heap::CopyJSObject(JSObject* source) {
   // Never used to copy functions.  If functions need to be copied we
   // have to be careful to clear the literals array.
-  ASSERT(!source->IsJSFunction());
+  SLOW_ASSERT(!source->IsJSFunction());
 
   // Make the clone.
   Map* map = source->map();
@@ -3714,7 +3714,7 @@
     { MaybeObject* maybe_clone = new_space_.AllocateRaw(object_size);
       if (!maybe_clone->ToObject(&clone)) return maybe_clone;
     }
-    ASSERT(InNewSpace(clone));
+    SLOW_ASSERT(InNewSpace(clone));
     // Since we know the clone is allocated in new space, we can copy
     // the contents without worrying about updating the write barrier.
     CopyBlock(HeapObject::cast(clone)->address(),
@@ -3722,7 +3722,8 @@
               object_size);
   }
 
-  ASSERT(JSObject::cast(clone)->GetElementsKind() == source->GetElementsKind());
+  SLOW_ASSERT(
+      JSObject::cast(clone)->GetElementsKind() == source->GetElementsKind());
   FixedArrayBase* elements = FixedArrayBase::cast(source->elements());
   FixedArray* properties = FixedArray::cast(source->properties());
   // Update elements if necessary.
@@ -4802,12 +4803,12 @@
                  HeapObject::cast(object));
         Object* new_object = *slot;
         if (InNewSpace(new_object)) {
-          ASSERT(Heap::InToSpace(new_object));
-          ASSERT(new_object->IsHeapObject());
+          SLOW_ASSERT(Heap::InToSpace(new_object));
+          SLOW_ASSERT(new_object->IsHeapObject());
           store_buffer_.EnterDirectlyIntoStoreBuffer(
               reinterpret_cast<Address>(slot));
         }
-        ASSERT(!MarkCompactCollector::IsOnEvacuationCandidate(new_object));
+        SLOW_ASSERT(!MarkCompactCollector::IsOnEvacuationCandidate(new_object));
       } else if (record_slots &&
                  MarkCompactCollector::IsOnEvacuationCandidate(object)) {
         mark_compact_collector()->RecordSlot(slot, slot, object);