diff --git a/dtool/src/dtoolbase/memoryHook.cxx b/dtool/src/dtoolbase/memoryHook.cxx
index 224fd3107b..efc2fc4392 100644
--- a/dtool/src/dtoolbase/memoryHook.cxx
+++ b/dtool/src/dtoolbase/memoryHook.cxx
@@ -202,13 +202,11 @@ MemoryHook() {
 
 #endif  // WIN32
 
-#ifdef DO_MEMORY_USAGE
   _total_heap_single_size = 0;
   _total_heap_array_size = 0;
   _requested_heap_size = 0;
   _total_mmap_size = 0;
   _max_heap_size = ~(size_t)0;
-#endif
 }
 
 /**
@@ -216,19 +214,16 @@ MemoryHook() {
  */
 MemoryHook::
 MemoryHook(const MemoryHook &copy) :
-  _page_size(copy._page_size)
-{
-#ifdef DO_MEMORY_USAGE
-  _total_heap_single_size = copy._total_heap_single_size;
-  _total_heap_array_size = copy._total_heap_array_size;
-  _requested_heap_size = copy._requested_heap_size;
-  _total_mmap_size = copy._total_mmap_size;
-  _max_heap_size = copy._max_heap_size;
-#endif
+  _page_size(copy._page_size),
+  _total_heap_single_size(copy._total_heap_single_size),
+  _total_heap_array_size(copy._total_heap_array_size),
+  _requested_heap_size(copy._requested_heap_size),
+  _total_mmap_size(copy._total_mmap_size),
+  _max_heap_size(copy._max_heap_size) {
 
-  ((MutexImpl &)copy._lock).acquire();
+  copy._lock.acquire();
   _deleted_chains = copy._deleted_chains;
-  ((MutexImpl &)copy._lock).release();
+  copy._lock.release();
 }
 
 /**
@@ -631,7 +626,6 @@ alloc_fail(size_t attempted_size) {
   abort();
 }
 
-#ifdef DO_MEMORY_USAGE
 /**
  * This callback method is called whenever the total allocated heap size
  * exceeds _max_heap_size.  It's mainly intended for reporting memory leaks,
@@ -642,6 +636,7 @@ alloc_fail(size_t attempted_size) {
  */
 void MemoryHook::
 overflow_heap_size() {
+#ifdef DO_MEMORY_USAGE
   _max_heap_size = ~(size_t)0;
-}
 #endif  // DO_MEMORY_USAGE
+}
diff --git a/dtool/src/dtoolbase/memoryHook.h b/dtool/src/dtoolbase/memoryHook.h
index 687e348aef..18ce70c0bb 100644
--- a/dtool/src/dtoolbase/memoryHook.h
+++ b/dtool/src/dtoolbase/memoryHook.h
@@ -67,7 +67,6 @@ public:
 
   INLINE static size_t get_ptr_size(void *ptr);
 
-#ifdef DO_MEMORY_USAGE
 protected:
   TVOLATILE AtomicAdjust::Integer _total_heap_single_size;
   TVOLATILE AtomicAdjust::Integer _total_heap_array_size;
@@ -79,7 +78,6 @@ protected:
   size_t _max_heap_size;
 
   virtual void overflow_heap_size();
-#endif  // DO_MEMORY_USAGE
 
 private:
   size_t _page_size;
@@ -87,7 +85,7 @@ private:
   typedef map<size_t, DeletedBufferChain *> DeletedChains;
   DeletedChains _deleted_chains;
 
-  MutexImpl _lock;
+  mutable MutexImpl _lock;
 };
 
 #include "memoryHook.I"
diff --git a/dtool/src/dtoolbase/typeRegistryNode.cxx b/dtool/src/dtoolbase/typeRegistryNode.cxx
index cdc45d7beb..a88533a769 100644
--- a/dtool/src/dtoolbase/typeRegistryNode.cxx
+++ b/dtool/src/dtoolbase/typeRegistryNode.cxx
@@ -26,9 +26,7 @@ TypeRegistryNode(TypeHandle handle, const string &name, TypeHandle &ref) :
   _handle(handle), _name(name), _ref(ref)
 {
   clear_subtree();
-#ifdef DO_MEMORY_USAGE
   memset(_memory_usage, 0, sizeof(_memory_usage));
-#endif
 }
 
 /**
diff --git a/dtool/src/dtoolbase/typeRegistryNode.h b/dtool/src/dtoolbase/typeRegistryNode.h
index 7eb64f8a65..46e4b9f5a1 100644
--- a/dtool/src/dtoolbase/typeRegistryNode.h
+++ b/dtool/src/dtoolbase/typeRegistryNode.h
@@ -47,9 +47,7 @@ public:
   Classes _parent_classes;
   Classes _child_classes;
 
-#ifdef DO_MEMORY_USAGE
   AtomicAdjust::Integer _memory_usage[TypeHandle::MC_limit];
-#endif
 
   static bool _paranoid_inheritance;
 
diff --git a/panda/src/express/memoryInfo.h b/panda/src/express/memoryInfo.h
index 238cec05e3..c65b890887 100644
--- a/panda/src/express/memoryInfo.h
+++ b/panda/src/express/memoryInfo.h
@@ -75,6 +75,9 @@ private:
 
 #include "memoryInfo.I"
 
+#else
+class MemoryInfo;
+
 #endif  // DO_MEMORY_USAGE
 
 #endif
diff --git a/panda/src/express/memoryUsage.I b/panda/src/express/memoryUsage.I
index f9de4f8c93..a4c2447189 100644
--- a/panda/src/express/memoryUsage.I
+++ b/panda/src/express/memoryUsage.I
@@ -16,9 +16,13 @@
  * to true, indicating that this class will be in effect.  If this returns
  * false, the user has indicated not to do any of this.
  */
-INLINE bool MemoryUsage::
+ALWAYS_INLINE bool MemoryUsage::
 get_track_memory_usage() {
+#ifdef DO_MEMORY_USAGE
   return get_global_ptr()->_track_memory_usage;
+#else
+  return false;
+#endif
 }
 
 /**
@@ -26,7 +30,19 @@ get_track_memory_usage() {
  */
 INLINE void MemoryUsage::
 record_pointer(ReferenceCount *ptr) {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_record_pointer(ptr);
+#endif
+}
+
+/**
+ * Indicates that the given pointer has been recently allocated.
+ */
+INLINE void MemoryUsage::
+record_pointer(void *ptr, TypeHandle type) {
+#ifdef DO_MEMORY_USAGE
+  get_global_ptr()->ns_record_pointer(ptr, type);
+#endif
 }
 
 /**
@@ -37,7 +53,9 @@ record_pointer(ReferenceCount *ptr) {
  */
 INLINE void MemoryUsage::
 update_type(ReferenceCount *ptr, TypeHandle type) {
-  get_global_ptr()->ns_update_type(ptr, type);
+#ifdef DO_MEMORY_USAGE
+  get_global_ptr()->ns_update_type((void *)ptr, type);
+#endif
 }
 
 /**
@@ -48,7 +66,21 @@ update_type(ReferenceCount *ptr, TypeHandle type) {
  */
 INLINE void MemoryUsage::
 update_type(ReferenceCount *ptr, TypedObject *typed_ptr) {
-  get_global_ptr()->ns_update_type(ptr, typed_ptr);
+#ifdef DO_MEMORY_USAGE
+  get_global_ptr()->ns_update_type((void *)ptr, typed_ptr);
+#endif
+}
+
+/**
+ * Associates the indicated type with the given pointer.  This should be
+ * called by functions (e.g.  the constructor) that know more specifically
+ * what type of thing we've got.
+ */
+INLINE void MemoryUsage::
+update_type(void *ptr, TypeHandle type) {
+#ifdef DO_MEMORY_USAGE
+  get_global_ptr()->ns_update_type(ptr, type);
+#endif
 }
 
 /**
@@ -56,7 +88,9 @@ update_type(ReferenceCount *ptr, TypedObject *typed_ptr) {
  */
 INLINE void MemoryUsage::
 remove_pointer(ReferenceCount *ptr) {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_remove_pointer(ptr);
+#endif
 }
 
 /**
@@ -65,7 +99,11 @@ remove_pointer(ReferenceCount *ptr) {
  */
 INLINE bool MemoryUsage::
 is_tracking() {
+#ifdef DO_MEMORY_USAGE
   return get_global_ptr()->_track_memory_usage;
+#else
+  return false;
+#endif
 }
 
 /**
@@ -75,7 +113,11 @@ is_tracking() {
  */
 INLINE bool MemoryUsage::
 is_counting() {
+#ifdef DO_MEMORY_USAGE
   return get_global_ptr()->_count_memory_usage;
+#else
+  return false;
+#endif
 }
 
 /**
@@ -84,7 +126,11 @@ is_counting() {
  */
 INLINE size_t MemoryUsage::
 get_current_cpp_size() {
+#ifdef DO_MEMORY_USAGE
   return get_global_ptr()->_current_cpp_size;
+#else
+  return 0;
+#endif
 }
 
 /**
@@ -93,7 +139,11 @@ get_current_cpp_size() {
  */
 INLINE size_t MemoryUsage::
 get_total_cpp_size() {
+#ifdef DO_MEMORY_USAGE
   return get_global_ptr()->_total_cpp_size;
+#else
+  return 0;
+#endif
 }
 
 /**
@@ -102,7 +152,11 @@ get_total_cpp_size() {
  */
 INLINE size_t MemoryUsage::
 get_panda_heap_single_size() {
+#ifdef DO_MEMORY_USAGE
   return (size_t)AtomicAdjust::get(get_global_ptr()->_total_heap_single_size);
+#else
+  return 0;
+#endif
 }
 
 /**
@@ -111,7 +165,11 @@ get_panda_heap_single_size() {
  */
 INLINE size_t MemoryUsage::
 get_panda_heap_array_size() {
+#ifdef DO_MEMORY_USAGE
   return (size_t)AtomicAdjust::get(get_global_ptr()->_total_heap_array_size);
+#else
+  return 0;
+#endif
 }
 
 /**
@@ -121,7 +179,7 @@ get_panda_heap_array_size() {
  */
 INLINE size_t MemoryUsage::
 get_panda_heap_overhead() {
-#if defined(USE_MEMORY_DLMALLOC) || defined(USE_MEMORY_PTMALLOC2)
+#if defined(DO_MEMORY_USAGE) && (defined(USE_MEMORY_DLMALLOC) || defined(USE_MEMORY_PTMALLOC2))
   MemoryUsage *mu = get_global_ptr();
   return (size_t)(AtomicAdjust::get(mu->_requested_heap_size) - AtomicAdjust::get(mu->_total_heap_single_size) - AtomicAdjust::get(mu->_total_heap_array_size));
 #else
@@ -135,7 +193,11 @@ get_panda_heap_overhead() {
  */
 INLINE size_t MemoryUsage::
 get_panda_mmap_size() {
+#ifdef DO_MEMORY_USAGE
   return (size_t)AtomicAdjust::get(get_global_ptr()->_total_mmap_size);
+#else
+  return 0;
+#endif
 }
 
 /**
@@ -152,6 +214,7 @@ get_panda_mmap_size() {
  */
 INLINE size_t MemoryUsage::
 get_external_size() {
+#ifdef DO_MEMORY_USAGE
   MemoryUsage *mu = get_global_ptr();
   if (mu->_count_memory_usage) {
     // We can only possibly know this with memory counting, which tracks every
@@ -169,6 +232,9 @@ get_external_size() {
   } else {
     return 0;
   }
+#else
+  return 0;
+#endif
 }
 
 /**
@@ -177,6 +243,7 @@ get_external_size() {
  */
 INLINE size_t MemoryUsage::
 get_total_size() {
+#ifdef DO_MEMORY_USAGE
   MemoryUsage *mu = get_global_ptr();
   if (mu->_count_memory_usage) {
     return mu->_total_size + (size_t)mu->_requested_heap_size;
@@ -187,6 +254,9 @@ get_total_size() {
     return (size_t)(AtomicAdjust::get(mu->_total_heap_single_size) + AtomicAdjust::get(mu->_total_heap_array_size));
 #endif
   }
+#else
+  return 0;
+#endif
 }
 
 /**
@@ -194,7 +264,11 @@ get_total_size() {
  */
 INLINE int MemoryUsage::
 get_num_pointers() {
+#ifdef DO_MEMORY_USAGE
   return get_global_ptr()->ns_get_num_pointers();
+#else
+  return 0;
+#endif
 }
 
 /**
@@ -203,7 +277,9 @@ get_num_pointers() {
  */
 INLINE void MemoryUsage::
 get_pointers(MemoryUsagePointers &result) {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_get_pointers(result);
+#endif
 }
 
 /**
@@ -212,7 +288,9 @@ get_pointers(MemoryUsagePointers &result) {
  */
 INLINE void MemoryUsage::
 get_pointers_of_type(MemoryUsagePointers &result, TypeHandle type) {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_get_pointers_of_type(result, type);
+#endif
 }
 
 /**
@@ -221,7 +299,9 @@ get_pointers_of_type(MemoryUsagePointers &result, TypeHandle type) {
  */
 INLINE void MemoryUsage::
 get_pointers_of_age(MemoryUsagePointers &result, double from, double to) {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_get_pointers_of_age(result, from, to);
+#endif
 }
 
 /**
@@ -242,7 +322,9 @@ get_pointers_of_age(MemoryUsagePointers &result, double from, double to) {
  */
 INLINE void MemoryUsage::
 get_pointers_with_zero_count(MemoryUsagePointers &result) {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_get_pointers_with_zero_count(result);
+#endif
 }
 
 /**
@@ -253,7 +335,9 @@ get_pointers_with_zero_count(MemoryUsagePointers &result) {
  */
 INLINE void MemoryUsage::
 freeze() {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_freeze();
+#endif
 }
 
 /**
@@ -261,7 +345,9 @@ freeze() {
  */
 INLINE void MemoryUsage::
 show_current_types() {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_show_current_types();
+#endif
 }
 
 /**
@@ -270,7 +356,9 @@ show_current_types() {
  */
 INLINE void MemoryUsage::
 show_trend_types() {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_show_trend_types();
+#endif
 }
 
 /**
@@ -278,7 +366,9 @@ show_trend_types() {
  */
 INLINE void MemoryUsage::
 show_current_ages() {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_show_current_ages();
+#endif
 }
 
 /**
@@ -287,7 +377,9 @@ show_current_ages() {
  */
 INLINE void MemoryUsage::
 show_trend_ages() {
+#ifdef DO_MEMORY_USAGE
   get_global_ptr()->ns_show_trend_ages();
+#endif
 }
 
 /**
@@ -295,6 +387,7 @@ show_trend_ages() {
  */
 INLINE MemoryUsage *MemoryUsage::
 get_global_ptr() {
+#ifdef DO_MEMORY_USAGE
 #ifdef __GNUC__
   // Tell the compiler that this is an unlikely branch.
   if (__builtin_expect(_global_ptr == nullptr, 0)) {
@@ -305,4 +398,7 @@ get_global_ptr() {
   }
 
   return _global_ptr;
+#else
+  return nullptr;
+#endif
 }
diff --git a/panda/src/express/memoryUsage.cxx b/panda/src/express/memoryUsage.cxx
index a834da9dad..178de476fa 100644
--- a/panda/src/express/memoryUsage.cxx
+++ b/panda/src/express/memoryUsage.cxx
@@ -12,9 +12,6 @@
  */
 
 #include "memoryUsage.h"
-
-#ifdef DO_MEMORY_USAGE
-
 #include "memoryUsagePointers.h"
 #include "trueClock.h"
 #include "typedReferenceCount.h"
@@ -45,16 +42,17 @@ double MemoryUsage::AgeHistogram::_cutoff[MemoryUsage::AgeHistogram::num_buckets
   60.0,
 };
 
-
 /**
  * Adds a single entry to the histogram.
  */
 void MemoryUsage::TypeHistogram::
 add_info(TypeHandle type, MemoryInfo *info) {
+#ifdef DO_MEMORY_USAGE
   _counts[type].add_info(info);
+#endif
 }
 
-
+#ifdef DO_MEMORY_USAGE
 // This class is a temporary class used only in TypeHistogram::show(), below,
 // to sort the types in descending order by counts.
 class TypeHistogramCountSorter {
@@ -71,12 +69,14 @@ public:
   MemoryUsagePointerCounts _count;
   TypeHandle _type;
 };
+#endif
 
 /**
  * Shows the contents of the histogram to nout.
  */
 void MemoryUsage::TypeHistogram::
 show() const {
+#ifdef DO_MEMORY_USAGE
   // First, copy the relevant information to a vector so we can sort by
   // counts.  Don't use a pvector.
   typedef vector<TypeHistogramCountSorter> CountSorter;
@@ -99,6 +99,7 @@ show() const {
     }
     nout << " : " << (*vi)._count << "\n";
   }
+#endif
 }
 
 /**
@@ -122,9 +123,11 @@ AgeHistogram() {
  */
 void MemoryUsage::AgeHistogram::
 add_info(double age, MemoryInfo *info) {
+#ifdef DO_MEMORY_USAGE
   int bucket = choose_bucket(age);
   nassertv(bucket >= 0 && bucket < num_buckets);
   _counts[bucket].add_info(info);
+#endif
 }
 
 /**
@@ -132,6 +135,7 @@ add_info(double age, MemoryInfo *info) {
  */
 void MemoryUsage::AgeHistogram::
 show() const {
+#ifdef DO_MEMORY_USAGE
   for (int i = 0; i < num_buckets - 1; i++) {
     nout << _cutoff[i] << " to " << _cutoff[i + 1] << " seconds old : ";
     _counts[i].output(nout);
@@ -140,6 +144,7 @@ show() const {
   nout << _cutoff[num_buckets - 1] << " seconds old and up : ";
   _counts[num_buckets - 1].output(nout);
   nout << "\n";
+#endif
 }
 
 /**
@@ -147,9 +152,11 @@ show() const {
  */
 void MemoryUsage::AgeHistogram::
 clear() {
+#ifdef DO_MEMORY_USAGE
   for (int i = 0; i < num_buckets; i++) {
     _counts[i].clear();
   }
+#endif
 }
 
 /**
@@ -157,6 +164,7 @@ clear() {
  */
 int MemoryUsage::AgeHistogram::
 choose_bucket(double age) const {
+#ifdef DO_MEMORY_USAGE
   for (int i = num_buckets - 1; i >= 0; i--) {
     if (age >= _cutoff[i]) {
       return i;
@@ -164,6 +172,7 @@ choose_bucket(double age) const {
   }
   express_cat.error()
     << "No suitable bucket for age " << age << "\n";
+#endif
   return 0;
 }
 
@@ -173,6 +182,7 @@ choose_bucket(double age) const {
  */
 void *MemoryUsage::
 heap_alloc_single(size_t size) {
+#ifdef DO_MEMORY_USAGE
   void *ptr;
 
   if (_recursion_protect) {
@@ -202,6 +212,9 @@ heap_alloc_single(size_t size) {
   }
 
   return ptr;
+#else
+  return MemoryHook::heap_alloc_single(size);
+#endif
 }
 
 /**
@@ -209,6 +222,7 @@ heap_alloc_single(size_t size) {
  */
 void MemoryUsage::
 heap_free_single(void *ptr) {
+#ifdef DO_MEMORY_USAGE
   if (_recursion_protect) {
     if (express_cat.is_spam()) {
       express_cat.spam()
@@ -231,6 +245,9 @@ heap_free_single(void *ptr) {
       MemoryHook::heap_free_single(ptr);
     }
   }
+#else
+  MemoryHook::heap_free_single(ptr);
+#endif
 }
 
 /**
@@ -239,6 +256,7 @@ heap_free_single(void *ptr) {
  */
 void *MemoryUsage::
 heap_alloc_array(size_t size) {
+#ifdef DO_MEMORY_USAGE
   void *ptr;
 
   if (_recursion_protect) {
@@ -268,6 +286,9 @@ heap_alloc_array(size_t size) {
   }
 
   return ptr;
+#else
+  return MemoryHook::heap_alloc_array(size);
+#endif
 }
 
 /**
@@ -275,6 +296,7 @@ heap_alloc_array(size_t size) {
  */
 void *MemoryUsage::
 heap_realloc_array(void *ptr, size_t size) {
+#ifdef DO_MEMORY_USAGE
   if (_recursion_protect) {
     ptr = MemoryHook::heap_realloc_array(ptr, size);
     if (express_cat.is_spam()) {
@@ -303,6 +325,9 @@ heap_realloc_array(void *ptr, size_t size) {
   }
 
   return ptr;
+#else
+  return MemoryHook::heap_realloc_array(ptr, size);
+#endif
 }
 
 /**
@@ -310,6 +335,7 @@ heap_realloc_array(void *ptr, size_t size) {
  */
 void MemoryUsage::
 heap_free_array(void *ptr) {
+#ifdef DO_MEMORY_USAGE
   if (_recursion_protect) {
     if (express_cat.is_spam()) {
       express_cat.spam()
@@ -332,6 +358,9 @@ heap_free_array(void *ptr) {
       MemoryHook::heap_free_array(ptr);
     }
   }
+#else
+  MemoryHook::heap_free_array(ptr);
+#endif
 }
 
 /**
@@ -343,6 +372,7 @@ heap_free_array(void *ptr) {
  */
 void MemoryUsage::
 mark_pointer(void *ptr, size_t size, ReferenceCount *ref_ptr) {
+#ifdef DO_MEMORY_USAGE
   if (_recursion_protect || !_track_memory_usage) {
     return;
   }
@@ -391,6 +421,7 @@ mark_pointer(void *ptr, size_t size, ReferenceCount *ref_ptr) {
     // We're removing this pointer from use.
     ns_remove_void_pointer(ptr);
   }
+#endif
 }
 
 #if (defined(WIN32_VC) || defined (WIN64_VC))&& defined(_DEBUG)
@@ -430,7 +461,23 @@ win32_malloc_hook(int alloc_type, void *ptr,
  *
  */
 MemoryUsage::
-MemoryUsage(const MemoryHook &copy) : MemoryHook(copy) {
+MemoryUsage(const MemoryHook &copy) :
+  MemoryHook(copy),
+  _info_set_dirty(false),
+  _freeze_index(0),
+  _count(0),
+  _current_cpp_size(0),
+  _total_cpp_size(0),
+  _total_size(0),
+
+  _track_memory_usage(false),
+  _startup_track_memory_usage(false),
+  _count_memory_usage(false),
+  _report_memory_usage(false),
+  _report_memory_interval(0.0),
+  _last_report_time(0.0) {
+
+#ifdef DO_MEMORY_USAGE
   // We must get these variables here instead of in config_express.cxx,
   // because we need to know it at static init time, and who knows when the
   // code in config_express will be executed.
@@ -456,9 +503,6 @@ MemoryUsage(const MemoryHook &copy) : MemoryHook(copy) {
     ("report-memory-interval", 5.0,
      PRC_DESC("This is the interval, in seconds, for reports of currently allocated "
               "memory, when report-memory-usage is true."));
-  _last_report_time = 0.0;
-
-  _count_memory_usage = false;
 
   int64_t max_heap_size = ConfigVariableInt64
     ("max-heap-size", 0,
@@ -480,13 +524,7 @@ MemoryUsage(const MemoryHook &copy) : MemoryHook(copy) {
   _CrtSetAllocHook(&win32_malloc_hook);
   _count_memory_usage = true;
 #endif
-
-  _info_set_dirty = false;
-  _freeze_index = 0;
-  _count = 0;
-  _current_cpp_size = 0;
-  _total_cpp_size = 0;
-  _total_size = 0;
+#endif  // DO_MEMORY_USAGE
 }
 
 /**
@@ -494,9 +532,16 @@ MemoryUsage(const MemoryHook &copy) : MemoryHook(copy) {
  */
 void MemoryUsage::
 init_memory_usage() {
+#ifdef DO_MEMORY_USAGE
   init_memory_hook();
   _global_ptr = new MemoryUsage(*memory_hook);
   memory_hook = _global_ptr;
+#else
+  // If this gets called, we still need to initialize the global_ptr with a
+  // stub even if we don't compile with memory usage tracking enabled, for ABI
+  // stability.  However, we won't replace the memory hook.
+  _global_ptr = new MemoryUsage(*memory_hook);
+#endif
 }
 
 /**
@@ -507,6 +552,7 @@ init_memory_usage() {
  */
 void MemoryUsage::
 overflow_heap_size() {
+#ifdef DO_MEMORY_USAGE
   MemoryHook::overflow_heap_size();
 
   express_cat.error()
@@ -524,6 +570,7 @@ overflow_heap_size() {
   // Turn on spamful debugging.
   _track_memory_usage = true;
   _report_memory_usage = true;
+#endif
 }
 
 /**
@@ -531,12 +578,13 @@ overflow_heap_size() {
  */
 void MemoryUsage::
 ns_record_pointer(ReferenceCount *ptr) {
+#ifdef DO_MEMORY_USAGE
   if (_track_memory_usage) {
     // We have to protect modifications to the table from recursive calls by
     // toggling _recursion_protect while we adjust it.
     _recursion_protect = true;
     pair<Table::iterator, bool> insert_result =
-      _table.insert(Table::value_type((void *)ptr, (MemoryInfo *)NULL));
+      _table.insert(Table::value_type((void *)ptr, nullptr));
 
     // This shouldn't fail.
     assert(insert_result.first != _table.end());
@@ -575,6 +623,61 @@ ns_record_pointer(ReferenceCount *ptr) {
       }
     }
   }
+#endif
+}
+
+
+/**
+ * Indicates that the given pointer has been recently allocated.
+ */
+void MemoryUsage::
+ns_record_pointer(void *ptr, TypeHandle type) {
+#ifdef DO_MEMORY_USAGE
+  if (_track_memory_usage) {
+    // We have to protect modifications to the table from recursive calls by
+    // toggling _recursion_protect while we adjust it.
+    _recursion_protect = true;
+    pair<Table::iterator, bool> insert_result =
+      _table.insert(Table::value_type(ptr, nullptr));
+
+    // This shouldn't fail.
+    assert(insert_result.first != _table.end());
+
+    if (insert_result.second) {
+      (*insert_result.first).second = new MemoryInfo;
+      _info_set_dirty = true;
+      ++_count;
+    }
+
+    MemoryInfo *info = (*insert_result.first).second;
+
+    // We should already have a pointer, thanks to a previous call to
+    // mark_pointer().
+    nassertv(info->_void_ptr == ptr && info->_ref_ptr == nullptr);
+
+    info->_void_ptr = ptr;
+    info->_static_type = type;
+    info->_dynamic_type = type;
+    info->_time = TrueClock::get_global_ptr()->get_long_time();
+    info->_freeze_index = _freeze_index;
+    info->_flags |= MemoryInfo::F_reconsider_dynamic_type;
+
+    // We close the recursion_protect flag all the way down here, so that we
+    // also protect ourselves against a possible recursive call in
+    // TrueClock::get_global_ptr().
+    _recursion_protect = false;
+
+    if (_report_memory_usage) {
+      double now = TrueClock::get_global_ptr()->get_long_time();
+      if (now - _last_report_time > _report_memory_interval) {
+        _last_report_time = now;
+        express_cat.info()
+          << "*** Current memory usage: " << get_total_size() << "\n";
+        show_current_types();
+      }
+    }
+  }
+#endif
 }
 
 /**
@@ -584,7 +687,8 @@ ns_record_pointer(ReferenceCount *ptr) {
  * only that it's a "ReferenceCount".
  */
 void MemoryUsage::
-ns_update_type(ReferenceCount *ptr, TypeHandle type) {
+ns_update_type(void *ptr, TypeHandle type) {
+#ifdef DO_MEMORY_USAGE
   if (_track_memory_usage) {
     Table::iterator ti;
     ti = _table.find(ptr);
@@ -592,7 +696,7 @@ ns_update_type(ReferenceCount *ptr, TypeHandle type) {
       if (_startup_track_memory_usage) {
         express_cat.error()
           << "Attempt to update type to " << type << " for unrecorded pointer "
-          << (void *)ptr << "!\n";
+          << ptr << "!\n";
         nassertv(false);
       }
       return;
@@ -605,6 +709,7 @@ ns_update_type(ReferenceCount *ptr, TypeHandle type) {
 
     consolidate_void_ptr(info);
   }
+#endif
 }
 
 /**
@@ -614,7 +719,8 @@ ns_update_type(ReferenceCount *ptr, TypeHandle type) {
  * the pointer as a TypedObject it doesn't need any more help.
  */
 void MemoryUsage::
-ns_update_type(ReferenceCount *ptr, TypedObject *typed_ptr) {
+ns_update_type(void *ptr, TypedObject *typed_ptr) {
+#ifdef DO_MEMORY_USAGE
   if (_track_memory_usage) {
     Table::iterator ti;
     ti = _table.find(ptr);
@@ -623,7 +729,7 @@ ns_update_type(ReferenceCount *ptr, TypedObject *typed_ptr) {
         express_cat.error()
           << "Attempt to update type to " << typed_ptr->get_type()
           << " for unrecorded pointer "
-          << (void *)ptr << "!\n";
+          << ptr << "!\n";
       }
       return;
     }
@@ -634,6 +740,7 @@ ns_update_type(ReferenceCount *ptr, TypedObject *typed_ptr) {
 
     consolidate_void_ptr(info);
   }
+#endif
 }
 
 /**
@@ -641,6 +748,7 @@ ns_update_type(ReferenceCount *ptr, TypedObject *typed_ptr) {
  */
 void MemoryUsage::
 ns_remove_pointer(ReferenceCount *ptr) {
+#ifdef DO_MEMORY_USAGE
   if (_track_memory_usage) {
     Table::iterator ti;
     ti = _table.find(ptr);
@@ -705,6 +813,7 @@ ns_remove_pointer(ReferenceCount *ptr) {
       }
     }
   }
+#endif
 }
 
 /**
@@ -713,6 +822,7 @@ ns_remove_pointer(ReferenceCount *ptr) {
  */
 void MemoryUsage::
 ns_record_void_pointer(void *ptr, size_t size) {
+#ifdef DO_MEMORY_USAGE
   if (_track_memory_usage) {
     if (express_cat.is_spam()) {
       express_cat.spam()
@@ -724,7 +834,7 @@ ns_record_void_pointer(void *ptr, size_t size) {
 
     _recursion_protect = true;
     pair<Table::iterator, bool> insert_result =
-      _table.insert(Table::value_type((void *)ptr, (MemoryInfo *)NULL));
+      _table.insert(Table::value_type((void *)ptr, nullptr));
 
     assert(insert_result.first != _table.end());
 
@@ -761,6 +871,7 @@ ns_record_void_pointer(void *ptr, size_t size) {
     // TrueClock::get_global_ptr().
     _recursion_protect = false;
   }
+#endif
 }
 
 /**
@@ -768,6 +879,7 @@ ns_record_void_pointer(void *ptr, size_t size) {
  */
 void MemoryUsage::
 ns_remove_void_pointer(void *ptr) {
+#ifdef DO_MEMORY_USAGE
   if (_track_memory_usage) {
     if (express_cat.is_spam()) {
       express_cat.spam()
@@ -823,6 +935,7 @@ ns_remove_void_pointer(void *ptr) {
     _info_set_dirty = true;
     delete info;
   }
+#endif
 }
 
 /**
@@ -830,8 +943,12 @@ ns_remove_void_pointer(void *ptr) {
  */
 int MemoryUsage::
 ns_get_num_pointers() {
+#ifdef DO_MEMORY_USAGE
   nassertr(_track_memory_usage, 0);
   return _count;
+#else
+  return 0;
+#endif
 }
 
 /**
@@ -840,6 +957,7 @@ ns_get_num_pointers() {
  */
 void MemoryUsage::
 ns_get_pointers(MemoryUsagePointers &result) {
+#ifdef DO_MEMORY_USAGE
   nassertv(_track_memory_usage);
   result.clear();
 
@@ -857,6 +975,7 @@ ns_get_pointers(MemoryUsagePointers &result) {
                        now - info->_time);
     }
   }
+#endif
 }
 
 /**
@@ -865,6 +984,7 @@ ns_get_pointers(MemoryUsagePointers &result) {
  */
 void MemoryUsage::
 ns_get_pointers_of_type(MemoryUsagePointers &result, TypeHandle type) {
+#ifdef DO_MEMORY_USAGE
   nassertv(_track_memory_usage);
   result.clear();
 
@@ -886,6 +1006,7 @@ ns_get_pointers_of_type(MemoryUsagePointers &result, TypeHandle type) {
       }
     }
   }
+#endif
 }
 
 /**
@@ -895,6 +1016,7 @@ ns_get_pointers_of_type(MemoryUsagePointers &result, TypeHandle type) {
 void MemoryUsage::
 ns_get_pointers_of_age(MemoryUsagePointers &result,
                        double from, double to) {
+#ifdef DO_MEMORY_USAGE
   nassertv(_track_memory_usage);
   result.clear();
 
@@ -915,6 +1037,7 @@ ns_get_pointers_of_age(MemoryUsagePointers &result,
       }
     }
   }
+#endif
 }
 
 /**
@@ -935,6 +1058,7 @@ ns_get_pointers_of_age(MemoryUsagePointers &result,
  */
 void MemoryUsage::
 ns_get_pointers_with_zero_count(MemoryUsagePointers &result) {
+#ifdef DO_MEMORY_USAGE
   nassertv(_track_memory_usage);
   result.clear();
 
@@ -955,6 +1079,7 @@ ns_get_pointers_with_zero_count(MemoryUsagePointers &result) {
       }
     }
   }
+#endif
 }
 
 /**
@@ -965,11 +1090,13 @@ ns_get_pointers_with_zero_count(MemoryUsagePointers &result) {
  */
 void MemoryUsage::
 ns_freeze() {
+#ifdef DO_MEMORY_USAGE
   _count = 0;
   _current_cpp_size = 0;
   _trend_types.clear();
   _trend_ages.clear();
   _freeze_index++;
+#endif
 }
 
 /**
@@ -977,6 +1104,7 @@ ns_freeze() {
  */
 void MemoryUsage::
 ns_show_current_types() {
+#ifdef DO_MEMORY_USAGE
   nassertv(_track_memory_usage);
   TypeHistogram hist;
 
@@ -994,6 +1122,7 @@ ns_show_current_types() {
   }
   hist.show();
   _recursion_protect = false;
+#endif
 }
 
 /**
@@ -1002,7 +1131,9 @@ ns_show_current_types() {
  */
 void MemoryUsage::
 ns_show_trend_types() {
+#ifdef DO_MEMORY_USAGE
   _trend_types.show();
+#endif
 }
 
 /**
@@ -1010,6 +1141,7 @@ ns_show_trend_types() {
  */
 void MemoryUsage::
 ns_show_current_ages() {
+#ifdef DO_MEMORY_USAGE
   nassertv(_track_memory_usage);
 
   AgeHistogram hist;
@@ -1026,6 +1158,7 @@ ns_show_current_ages() {
 
   hist.show();
   _recursion_protect = false;
+#endif
 }
 
 /**
@@ -1037,6 +1170,8 @@ ns_show_trend_ages() {
   _trend_ages.show();
 }
 
+#ifdef DO_MEMORY_USAGE
+
 /**
  * If the size information has not yet been determined for this pointer,
  * checks to see if it has possibly been recorded under the TypedObject
@@ -1126,5 +1261,4 @@ refresh_info_set() {
   _info_set_dirty = false;
 }
 
-
 #endif  // DO_MEMORY_USAGE
diff --git a/panda/src/express/memoryUsage.h b/panda/src/express/memoryUsage.h
index eb4cc6856e..87fc4f59d8 100644
--- a/panda/src/express/memoryUsage.h
+++ b/panda/src/express/memoryUsage.h
@@ -15,9 +15,6 @@
 #define MEMORYUSAGE_H
 
 #include "pandabase.h"
-
-#ifdef DO_MEMORY_USAGE
-
 #include "typedObject.h"
 #include "memoryInfo.h"
 #include "memoryUsagePointerCounts.h"
@@ -33,18 +30,22 @@ class MemoryUsagePointers;
  * every such object currently allocated.
  *
  * When compiled with NDEBUG set, this entire class does nothing and compiles
- * to nothing.
+ * to a stub.
  */
 class EXPCL_PANDAEXPRESS MemoryUsage : public MemoryHook {
 public:
-  INLINE static bool get_track_memory_usage();
+  ALWAYS_INLINE static bool get_track_memory_usage();
 
   INLINE static void record_pointer(ReferenceCount *ptr);
+  INLINE static void record_pointer(void *ptr, TypeHandle type);
   INLINE static void update_type(ReferenceCount *ptr, TypeHandle type);
   INLINE static void update_type(ReferenceCount *ptr, TypedObject *typed_ptr);
+  INLINE static void update_type(void *ptr, TypeHandle type);
   INLINE static void remove_pointer(ReferenceCount *ptr);
 
-public:
+protected:
+  // These are not marked public, but they can be accessed via the MemoryHook
+  // base class.
   virtual void *heap_alloc_single(size_t size);
   virtual void heap_free_single(void *ptr);
 
@@ -98,8 +99,9 @@ private:
   static void init_memory_usage();
 
   void ns_record_pointer(ReferenceCount *ptr);
-  void ns_update_type(ReferenceCount *ptr, TypeHandle type);
-  void ns_update_type(ReferenceCount *ptr, TypedObject *typed_ptr);
+  void ns_record_pointer(void *ptr, TypeHandle type);
+  void ns_update_type(void *ptr, TypeHandle type);
+  void ns_update_type(void *ptr, TypedObject *typed_ptr);
   void ns_remove_pointer(ReferenceCount *ptr);
 
   void ns_record_void_pointer(void *ptr, size_t size);
@@ -120,8 +122,10 @@ private:
   void ns_show_current_ages();
   void ns_show_trend_ages();
 
+#ifdef DO_MEMORY_USAGE
   void consolidate_void_ptr(MemoryInfo *info);
   void refresh_info_set();
+#endif
 
   static MemoryUsage *_global_ptr;
 
@@ -196,6 +200,4 @@ private:
 
 #include "memoryUsage.I"
 
-#endif  // DO_MEMORY_USAGE
-
 #endif
diff --git a/panda/src/express/memoryUsagePointerCounts.cxx b/panda/src/express/memoryUsagePointerCounts.cxx
index d218d57589..b91be61bcc 100644
--- a/panda/src/express/memoryUsagePointerCounts.cxx
+++ b/panda/src/express/memoryUsagePointerCounts.cxx
@@ -12,9 +12,6 @@
  */
 
 #include "memoryUsagePointerCounts.h"
-
-#ifdef DO_MEMORY_USAGE
-
 #include "memoryInfo.h"
 
 /**
@@ -22,6 +19,7 @@
  */
 void MemoryUsagePointerCounts::
 add_info(MemoryInfo *info) {
+#ifdef DO_MEMORY_USAGE
   _count++;
 
   if (info->is_size_known()) {
@@ -29,6 +27,7 @@ add_info(MemoryInfo *info) {
   } else {
     _unknown_size_count++;
   }
+#endif
 }
 
 /**
@@ -36,6 +35,7 @@ add_info(MemoryInfo *info) {
  */
 void MemoryUsagePointerCounts::
 output(ostream &out) const {
+#ifdef DO_MEMORY_USAGE
   out << _count << " pointers";
   if (_unknown_size_count < _count) {
     out << ", ";
@@ -48,6 +48,7 @@ output(ostream &out) const {
       out << " (" << _unknown_size_count << " of unknown size)";
     }
   }
+#endif
 }
 
 /**
@@ -56,6 +57,7 @@ output(ostream &out) const {
  */
 void MemoryUsagePointerCounts::
 output_bytes(ostream &out, size_t size) {
+#ifdef DO_MEMORY_USAGE
   if (size < 4 * 1024) {
     out << size << " bytes";
 
@@ -65,6 +67,5 @@ output_bytes(ostream &out, size_t size) {
   } else {
     out << size / (1024 * 1024) << " Mb";
   }
+#endif
 }
-
-#endif  // DO_MEMORY_USAGE
diff --git a/panda/src/express/memoryUsagePointerCounts.h b/panda/src/express/memoryUsagePointerCounts.h
index 935538fdee..2d95052ad8 100644
--- a/panda/src/express/memoryUsagePointerCounts.h
+++ b/panda/src/express/memoryUsagePointerCounts.h
@@ -16,8 +16,6 @@
 
 #include "pandabase.h"
 
-#ifdef DO_MEMORY_USAGE
-
 class MemoryInfo;
 
 /**
@@ -55,6 +53,4 @@ INLINE ostream &operator << (ostream &out, const MemoryUsagePointerCounts &c);
 
 #include "memoryUsagePointerCounts.I"
 
-#endif  // DO_MEMORY_USAGE
-
 #endif
diff --git a/panda/src/express/memoryUsagePointers.cxx b/panda/src/express/memoryUsagePointers.cxx
index fff8199c5a..dd412958da 100644
--- a/panda/src/express/memoryUsagePointers.cxx
+++ b/panda/src/express/memoryUsagePointers.cxx
@@ -12,9 +12,6 @@
  */
 
 #include "memoryUsagePointers.h"
-
-#ifdef DO_MEMORY_USAGE
-
 #include "config_express.h"
 #include "referenceCount.h"
 #include "typedReferenceCount.h"
@@ -38,7 +35,11 @@ MemoryUsagePointers::
  */
 size_t MemoryUsagePointers::
 get_num_pointers() const {
+#ifdef DO_MEMORY_USAGE
   return _entries.size();
+#else
+  return 0;
+#endif
 }
 
 /**
@@ -46,21 +47,26 @@ get_num_pointers() const {
  */
 ReferenceCount *MemoryUsagePointers::
 get_pointer(size_t n) const {
-  nassertr(n < get_num_pointers(), NULL);
+#ifdef DO_MEMORY_USAGE
+  nassertr(n < get_num_pointers(), nullptr);
   return _entries[n]._ref_ptr;
+#else
+  return nullptr;
+#endif
 }
 
 /**
  * Returns the nth pointer of the set, typecast to a TypedObject if possible.
  * If the pointer is not a TypedObject or if the cast cannot be made, returns
- * NULL.
+ * nullptr.
  */
 TypedObject *MemoryUsagePointers::
 get_typed_pointer(size_t n) const {
-  nassertr(n < get_num_pointers(), NULL);
+#ifdef DO_MEMORY_USAGE
+  nassertr(n < get_num_pointers(), nullptr);
   TypedObject *typed_ptr = _entries[n]._typed_ptr;
 
-  if (typed_ptr != (TypedObject *)NULL) {
+  if (typed_ptr != nullptr) {
     return typed_ptr;
   }
 
@@ -85,7 +91,8 @@ get_typed_pointer(size_t n) const {
       type.is_derived_from(TypedReferenceCount::get_class_type())) {
     return (TypedReferenceCount *)ref_ptr;
   }
-  return NULL;
+#endif
+  return nullptr;
 }
 
 /**
@@ -93,8 +100,12 @@ get_typed_pointer(size_t n) const {
  */
 TypeHandle MemoryUsagePointers::
 get_type(size_t n) const {
+#ifdef DO_MEMORY_USAGE
   nassertr(n < get_num_pointers(), TypeHandle::none());
   return _entries[n]._type;
+#else
+  return TypeHandle::none();
+#endif
 }
 
 /**
@@ -102,8 +113,12 @@ get_type(size_t n) const {
  */
 string MemoryUsagePointers::
 get_type_name(size_t n) const {
+#ifdef DO_MEMORY_USAGE
   nassertr(n < get_num_pointers(), "");
   return get_type(n).get_name();
+#else
+  return "";
+#endif
 }
 
 /**
@@ -113,8 +128,12 @@ get_type_name(size_t n) const {
  */
 double MemoryUsagePointers::
 get_age(size_t n) const {
+#ifdef DO_MEMORY_USAGE
   nassertr(n < get_num_pointers(), 0.0);
   return _entries[n]._age;
+#else
+  return 0.0;
+#endif
 }
 
 /**
@@ -122,7 +141,9 @@ get_age(size_t n) const {
  */
 void MemoryUsagePointers::
 clear() {
+#ifdef DO_MEMORY_USAGE
   _entries.clear();
+#endif
 }
 
 /**
@@ -130,7 +151,9 @@ clear() {
  */
 void MemoryUsagePointers::
 output(ostream &out) const {
+#ifdef DO_MEMORY_USAGE
   out << _entries.size() << " pointers.";
+#endif
 }
 
 /**
@@ -139,13 +162,12 @@ output(ostream &out) const {
 void MemoryUsagePointers::
 add_entry(ReferenceCount *ref_ptr, TypedObject *typed_ptr,
           TypeHandle type, double age) {
+#ifdef DO_MEMORY_USAGE
   // We can't safely add pointers with a zero reference count.  They might be
   // statically-allocated or something, and if we try to add them they'll try
   // to destruct when the PointerTo later goes away.
   if (ref_ptr->get_ref_count() != 0) {
     _entries.push_back(Entry(ref_ptr, typed_ptr, type, age));
   }
+#endif
 }
-
-
-#endif  // DO_MEMORY_USAGE
diff --git a/panda/src/express/memoryUsagePointers.h b/panda/src/express/memoryUsagePointers.h
index 317910760b..344c2edc6b 100644
--- a/panda/src/express/memoryUsagePointers.h
+++ b/panda/src/express/memoryUsagePointers.h
@@ -15,9 +15,6 @@
 #define MEMORYUSAGEPOINTERS_H
 
 #include "pandabase.h"
-
-#ifdef DO_MEMORY_USAGE
-
 #include "typedObject.h"
 #include "pointerTo.h"
 #include "referenceCount.h"
@@ -53,7 +50,9 @@ PUBLISHED:
   string get_type_name(size_t n) const;
   double get_age(size_t n) const;
 
+#ifdef DO_MEMORY_USAGE
   EXTENSION(PyObject *get_python_pointer(size_t n) const);
+#endif
 
   void clear();
 
@@ -94,6 +93,4 @@ INLINE ostream &operator << (ostream &out, const MemoryUsagePointers &mup) {
 
 #include "memoryUsagePointers.I"
 
-#endif  // MEMORY_USAGE_POINTERS
-
 #endif
diff --git a/panda/src/express/pointerToBase.I b/panda/src/express/pointerToBase.I
index d57064967b..bf4ff877f0 100644
--- a/panda/src/express/pointerToBase.I
+++ b/panda/src/express/pointerToBase.I
@@ -141,7 +141,6 @@ reassign(const PointerToBase<To> &copy) {
   }
 }
 
-#ifdef DO_MEMORY_USAGE
 /**
  * Ensures that the MemoryUsage record for the pointer has the right type of
  * object, if we know the type ourselves.
@@ -149,6 +148,7 @@ reassign(const PointerToBase<To> &copy) {
 template<class T>
 INLINE void PointerToBase<T>::
 update_type(To *ptr) {
+#ifdef DO_MEMORY_USAGE
   if (MemoryUsage::get_track_memory_usage()) {
     TypeHandle type = get_type_handle(To);
     if (type == TypeHandle::none()) {
@@ -159,9 +159,8 @@ update_type(To *ptr) {
       MemoryUsage::update_type(ptr, type);
     }
   }
-}
 #endif  // DO_MEMORY_USAGE
-
+}
 
 /**
  * A convenient way to set the PointerTo object to NULL. (Assignment to a NULL
diff --git a/panda/src/express/pointerToBase.h b/panda/src/express/pointerToBase.h
index 7d5524f2b9..919f596c33 100644
--- a/panda/src/express/pointerToBase.h
+++ b/panda/src/express/pointerToBase.h
@@ -44,9 +44,7 @@ protected:
   INLINE void reassign(To *ptr);
   INLINE void reassign(const PointerToBase<To> &copy);
 
-#ifdef DO_MEMORY_USAGE
   INLINE void update_type(To *ptr);
-#endif  // DO_MEMORY_USAGE
 
   // No assignment or retrieval functions are declared in PointerToBase,
   // because we will have to specialize on const vs.  non-const later.
diff --git a/panda/src/express/threadSafePointerToBase.I b/panda/src/express/threadSafePointerToBase.I
index db8166b78a..4d200a483a 100644
--- a/panda/src/express/threadSafePointerToBase.I
+++ b/panda/src/express/threadSafePointerToBase.I
@@ -89,7 +89,6 @@ reassign(const ThreadSafePointerToBase<To> &copy) {
   reassign((To *)copy._void_ptr);
 }
 
-#ifdef DO_MEMORY_USAGE
 /**
  * Ensures that the MemoryUsage record for the pointer has the right type of
  * object, if we know the type ourselves.
@@ -97,6 +96,7 @@ reassign(const ThreadSafePointerToBase<To> &copy) {
 template<class T>
 void ThreadSafePointerToBase<T>::
 update_type(To *ptr) {
+#ifdef DO_MEMORY_USAGE
   TypeHandle type = get_type_handle(To);
   if (type == TypeHandle::none()) {
     do_init_type(To);
@@ -105,9 +105,8 @@ update_type(To *ptr) {
   if (type != TypeHandle::none()) {
     MemoryUsage::update_type(ptr, type);
   }
-}
 #endif  // DO_MEMORY_USAGE
-
+}
 
 /**
  * A convenient way to set the ThreadSafePointerTo object to NULL. (Assignment
diff --git a/panda/src/express/threadSafePointerToBase.h b/panda/src/express/threadSafePointerToBase.h
index dedcfd08ab..78c6d75cca 100644
--- a/panda/src/express/threadSafePointerToBase.h
+++ b/panda/src/express/threadSafePointerToBase.h
@@ -40,9 +40,7 @@ protected:
   INLINE void reassign(To *ptr);
   INLINE void reassign(const ThreadSafePointerToBase<To> &copy);
 
-#ifdef DO_MEMORY_USAGE
   void update_type(To *ptr);
-#endif  // DO_MEMORY_USAGE
 
   // No assignment or retrieval functions are declared in
   // ThreadSafePointerToBase, because we will have to specialize on const vs.
diff --git a/panda/src/gobj/internalName.h b/panda/src/gobj/internalName.h
index bc636eb1c9..eff928b668 100644
--- a/panda/src/gobj/internalName.h
+++ b/panda/src/gobj/internalName.h
@@ -178,11 +178,9 @@ private:
   static TypeHandle _texcoord_type_handle;
 };
 
-#ifdef DO_MEMORY_USAGE
 // We can safely redefine this as a no-op.
 template<>
 INLINE void PointerToBase<InternalName>::update_type(To *ptr) {}
-#endif
 
 INLINE ostream &operator << (ostream &out, const InternalName &tcn);
 
diff --git a/panda/src/mathutil/geometricBoundingVolume.h b/panda/src/mathutil/geometricBoundingVolume.h
index cc48177f17..a27c19a724 100644
--- a/panda/src/mathutil/geometricBoundingVolume.h
+++ b/panda/src/mathutil/geometricBoundingVolume.h
@@ -83,11 +83,9 @@ private:
   static TypeHandle _type_handle;
 };
 
-#ifdef DO_MEMORY_USAGE
 // We can safely redefine this as a no-op.
 template<>
 INLINE void PointerToBase<GeometricBoundingVolume>::update_type(To *ptr) {}
-#endif
 
 #include "geometricBoundingVolume.I"
 
diff --git a/panda/src/pgraph/cullPlanes.h b/panda/src/pgraph/cullPlanes.h
index c091eebdc9..4b29fb7794 100644
--- a/panda/src/pgraph/cullPlanes.h
+++ b/panda/src/pgraph/cullPlanes.h
@@ -74,11 +74,9 @@ private:
   Occluders _occluders;
 };
 
-#ifdef DO_MEMORY_USAGE
 // We can safely redefine this as a no-op.
 template<>
 INLINE void PointerToBase<CullPlanes>::update_type(To *ptr) {}
-#endif
 
 #include "cullPlanes.I"
 
diff --git a/panda/src/pgraph/cullableObject.I b/panda/src/pgraph/cullableObject.I
index e93e826a58..e5e7229d09 100644
--- a/panda/src/pgraph/cullableObject.I
+++ b/panda/src/pgraph/cullableObject.I
@@ -17,7 +17,7 @@
 INLINE CullableObject::
 CullableObject() {
 #ifdef DO_MEMORY_USAGE
-  MemoryUsage::update_type(this, get_class_type());
+  MemoryUsage::record_pointer(this, get_class_type());
 #endif
 }
 
@@ -33,7 +33,7 @@ CullableObject(CPT(Geom) geom, CPT(RenderState) state,
   _internal_transform(move(internal_transform))
 {
 #ifdef DO_MEMORY_USAGE
-  MemoryUsage::update_type(this, get_class_type());
+  MemoryUsage::record_pointer(this, get_class_type());
 #endif
 }
 
@@ -48,7 +48,7 @@ CullableObject(const CullableObject &copy) :
   _internal_transform(copy._internal_transform)
 {
 #ifdef DO_MEMORY_USAGE
-  MemoryUsage::update_type(this, get_class_type());
+  MemoryUsage::record_pointer(this, get_class_type());
 #endif
 }
 
diff --git a/panda/src/pgraph/cullableObject.h b/panda/src/pgraph/cullableObject.h
index 1415052770..a8595da9f5 100644
--- a/panda/src/pgraph/cullableObject.h
+++ b/panda/src/pgraph/cullableObject.h
@@ -21,7 +21,6 @@
 #include "renderState.h"
 #include "transformState.h"
 #include "pointerTo.h"
-#include "referenceCount.h"
 #include "geomNode.h"
 #include "cullTraverserData.h"
 #include "pStatCollector.h"
@@ -39,11 +38,7 @@ class GeomMunger;
  * The smallest atom of cull.  This is normally just a Geom and its associated
  * state, but it also contain a draw callback.
  */
-class EXPCL_PANDA_PGRAPH CullableObject
-#ifdef DO_MEMORY_USAGE
-  : public ReferenceCount   // We inherit from ReferenceCount just to get the memory type tracking that MemoryUsage provides.
-#endif  // DO_MEMORY_USAGE
-{
+class EXPCL_PANDA_PGRAPH CullableObject {
 public:
   INLINE CullableObject();
   INLINE CullableObject(CPT(Geom) geom, CPT(RenderState) state,
@@ -124,13 +119,7 @@ public:
     return _type_handle;
   }
   static void init_type() {
-#ifdef DO_MEMORY_USAGE
-    ReferenceCount::init_type();
-    register_type(_type_handle, "CullableObject",
-                  ReferenceCount::get_class_type());
-#else
     register_type(_type_handle, "CullableObject");
-#endif  // DO_MEMORY_USAGE
   }
 
 private:
diff --git a/panda/src/pgraph/nodePathComponent.h b/panda/src/pgraph/nodePathComponent.h
index b0ed69a389..2106430b7d 100644
--- a/panda/src/pgraph/nodePathComponent.h
+++ b/panda/src/pgraph/nodePathComponent.h
@@ -125,11 +125,9 @@ private:
   friend class NodePath;
 };
 
-#ifdef DO_MEMORY_USAGE
 // We can safely redefine this as a no-op.
 template<>
 INLINE void PointerToBase<NodePathComponent>::update_type(To *ptr) {}
-#endif
 
 INLINE ostream &operator << (ostream &out, const NodePathComponent &comp);
 
diff --git a/panda/src/pgraph/pandaNode.h b/panda/src/pgraph/pandaNode.h
index b55f160588..a0a2d0f9a3 100644
--- a/panda/src/pgraph/pandaNode.h
+++ b/panda/src/pgraph/pandaNode.h
@@ -907,11 +907,9 @@ private:
 
 };
 
-#ifdef DO_MEMORY_USAGE
 // We can safely redefine this as a no-op.
 template<>
 INLINE void PointerToBase<PandaNode>::update_type(To *ptr) {}
-#endif
 
 INLINE ostream &operator << (ostream &out, const PandaNode &node) {
   node.output(out);
diff --git a/panda/src/pgraph/renderState.h b/panda/src/pgraph/renderState.h
index f91f02cd3e..a1b1813ea9 100644
--- a/panda/src/pgraph/renderState.h
+++ b/panda/src/pgraph/renderState.h
@@ -368,11 +368,9 @@ private:
   friend class Extension<RenderState>;
 };
 
-#ifdef DO_MEMORY_USAGE
 // We can safely redefine this as a no-op.
 template<>
 INLINE void PointerToBase<RenderState>::update_type(To *ptr) {}
-#endif
 
 INLINE ostream &operator << (ostream &out, const RenderState &state) {
   state.output(out);
diff --git a/panda/src/pgraph/transformState.h b/panda/src/pgraph/transformState.h
index 3fd628be7c..b4efd5abf3 100644
--- a/panda/src/pgraph/transformState.h
+++ b/panda/src/pgraph/transformState.h
@@ -406,11 +406,9 @@ private:
   friend class Extension<TransformState>;
 };
 
-#ifdef DO_MEMORY_USAGE
 // We can safely redefine this as a no-op.
 template<>
 INLINE void PointerToBase<TransformState>::update_type(To *ptr) {}
-#endif
 
 INLINE ostream &operator << (ostream &out, const TransformState &state) {
   state.output(out);
diff --git a/panda/src/putil/copyOnWriteObject.h b/panda/src/putil/copyOnWriteObject.h
index 37302ea44a..2f6b5cc9fc 100644
--- a/panda/src/putil/copyOnWriteObject.h
+++ b/panda/src/putil/copyOnWriteObject.h
@@ -161,11 +161,9 @@ private:
   static TypeHandle _type_handle;
 };
 
-#ifdef DO_MEMORY_USAGE
 // We can safely redefine this as a no-op.
 template<>
 INLINE void PointerToBase<CopyOnWriteObject>::update_type(To *ptr) {}
-#endif
 
 #include "copyOnWriteObject.I"
 
diff --git a/panda/src/putil/typedWritableReferenceCount.h b/panda/src/putil/typedWritableReferenceCount.h
index 51803d7b36..69fabf86ee 100644
--- a/panda/src/putil/typedWritableReferenceCount.h
+++ b/panda/src/putil/typedWritableReferenceCount.h
@@ -61,10 +61,9 @@ private:
   static TypeHandle _type_handle;
 };
 
-#ifdef DO_MEMORY_USAGE
+// We can safely redefine this as a no-op.
 template<>
 INLINE void PointerToBase<TypedWritableReferenceCount>::update_type(To *ptr) {}
-#endif
 
 #include "typedWritableReferenceCount.I"