diff --git a/panda/src/display/frameBufferProperties.I b/panda/src/display/frameBufferProperties.I
index 6f2d3257ee..70c809c64b 100644
--- a/panda/src/display/frameBufferProperties.I
+++ b/panda/src/display/frameBufferProperties.I
@@ -11,21 +11,6 @@
  * @date 2003-01-27
  */
 
-/**
- *
- */
-INLINE FrameBufferProperties::
-FrameBufferProperties(const FrameBufferProperties &copy) {
-  (*this) = copy;
-}
-
-/**
- *
- */
-INLINE FrameBufferProperties::
-~FrameBufferProperties() {
-}
-
 /**
  *
  */
diff --git a/panda/src/display/frameBufferProperties.cxx b/panda/src/display/frameBufferProperties.cxx
index ea37cc4381..81d12a98ba 100644
--- a/panda/src/display/frameBufferProperties.cxx
+++ b/panda/src/display/frameBufferProperties.cxx
@@ -17,28 +17,6 @@
 #include "config_display.h"
 #include "texture.h"
 
-/**
- *
- */
-FrameBufferProperties::
-FrameBufferProperties() {
-  clear();
-}
-
-/**
- *
- */
-void FrameBufferProperties::
-operator = (const FrameBufferProperties &copy) {
-  _flags_specified = copy._flags_specified;
-  _flags = copy._flags;
-  _specified = copy._specified;
-
-  for (int i = 0; i < FBP_COUNT; ++i) {
-    _property[i]  = copy._property[i];
-  }
-}
-
 /**
  * Returns true if this set of properties makes strictly greater or equal
  * demands of the framebuffer than the other set of framebuffer properties.
diff --git a/panda/src/display/frameBufferProperties.h b/panda/src/display/frameBufferProperties.h
index 9ac6c015ea..67e0c50d1e 100644
--- a/panda/src/display/frameBufferProperties.h
+++ b/panda/src/display/frameBufferProperties.h
@@ -63,11 +63,11 @@ private:
     FBF_all            = 0x100-1,
   };
 
-  int _property[FBP_COUNT];
-  int _specified;
+  int _property[FBP_COUNT] = {0};
+  int _specified = 0;
 
-  int _flags;
-  int _flags_specified;
+  int _flags = 0;
+  int _flags_specified = 0;
 
 PUBLISHED:
 
@@ -145,10 +145,8 @@ PUBLISHED:
 
   // Other.
 
-  FrameBufferProperties();
-  INLINE FrameBufferProperties(const FrameBufferProperties &copy);
-  INLINE ~FrameBufferProperties();
-  void operator = (const FrameBufferProperties &copy);
+  constexpr FrameBufferProperties() = default;
+
   static const FrameBufferProperties &get_default();
   bool operator == (const FrameBufferProperties &other) const;
   INLINE bool operator != (const FrameBufferProperties &other) const;
diff --git a/panda/src/egg/eggParameters.cxx b/panda/src/egg/eggParameters.cxx
index 14b63ba8ea..b9fc709fcd 100644
--- a/panda/src/egg/eggParameters.cxx
+++ b/panda/src/egg/eggParameters.cxx
@@ -17,26 +17,3 @@
 
 static EggParameters default_egg_parameters;
 EggParameters *egg_parameters = &default_egg_parameters;
-
-
-/**
- * Initializes all the parameters with default values.
- */
-EggParameters::
-EggParameters() {
-  _pos_threshold = 0.0001;
-  _normal_threshold = 0.0001;
-  _uv_threshold = 0.0001;
-  _color_threshold = 1.0/256.0;
-
-  _table_threshold = 0.0001;
-}
-
-
-/**
- *
- */
-EggParameters::
-EggParameters(const EggParameters &other) {
-  memcpy(this, &other, sizeof(EggParameters));
-}
diff --git a/panda/src/egg/eggParameters.h b/panda/src/egg/eggParameters.h
index 36bd1e48f6..93b1aff8b0 100644
--- a/panda/src/egg/eggParameters.h
+++ b/panda/src/egg/eggParameters.h
@@ -31,28 +31,27 @@
  */
 class EXPCL_PANDAEGG EggParameters {
 public:
-  EggParameters();
-  EggParameters(const EggParameters &copy);
+  constexpr EggParameters() = default;
 
   // The per-component difference below which two vertices are deemed to be at
   // the same position.
-  double _pos_threshold;
+  double _pos_threshold = 0.0001;
 
   // The per-component difference below which two vertices are deemed to have
   // the same normal.
-  double _normal_threshold;
+  double _normal_threshold = 0.0001;
 
   // The per-component difference below which two vertices are deemed to have
   // the same texture coordinates.
-  double _uv_threshold;
+  double _uv_threshold = 0.0001;
 
   // The per-component difference below which two vertices are deemed to have
   // the same color.
-  PN_stdfloat _color_threshold;
+  PN_stdfloat _color_threshold = 1.0/256.0;
 
   // The per-component difference below which two anim table values are deemed
   // to be equivalent.
-  double _table_threshold;
+  double _table_threshold = 0.0001;
 };
 
 extern EXPCL_PANDAEGG EggParameters *egg_parameters;
diff --git a/panda/src/pgraph/cacheStats.I b/panda/src/pgraph/cacheStats.I
index a83e480757..e84ff83878 100644
--- a/panda/src/pgraph/cacheStats.I
+++ b/panda/src/pgraph/cacheStats.I
@@ -17,7 +17,7 @@
 INLINE void CacheStats::
 maybe_report(const char *name) {
 #ifndef NDEBUG
-  if (_cache_report) {
+  if (UNLIKELY(_cache_report)) {
     double now = ClockObject::get_global_clock()->get_real_time();
     if (now - _last_reset < _cache_report_interval) {
       return;
diff --git a/panda/src/pgraph/cacheStats.cxx b/panda/src/pgraph/cacheStats.cxx
index 88a5498384..e16c14801e 100644
--- a/panda/src/pgraph/cacheStats.cxx
+++ b/panda/src/pgraph/cacheStats.cxx
@@ -22,10 +22,7 @@ void CacheStats::
 init() {
 #ifndef NDEBUG
   // Let's not use the clock at static init time.
-  reset(0.0);
-  // reset(ClockObject::get_global_clock()->get_real_time());
-  _total_cache_size = 0;
-  _num_states = 0;
+  //reset(ClockObject::get_global_clock()->get_real_time());
 
   _cache_report = ConfigVariableBool("cache-report", false);
   _cache_report_interval = ConfigVariableDouble("cache-report-interval", 5.0);
diff --git a/panda/src/pgraph/cacheStats.h b/panda/src/pgraph/cacheStats.h
index 45fb1e6043..12707c4bf0 100644
--- a/panda/src/pgraph/cacheStats.h
+++ b/panda/src/pgraph/cacheStats.h
@@ -24,6 +24,7 @@
  */
 class EXPCL_PANDA_PGRAPH CacheStats {
 public:
+  constexpr CacheStats() = default;
   void init();
   void reset(double now);
   void write(ostream &out, const char *name) const;
@@ -38,17 +39,17 @@ public:
 
 private:
 #ifndef NDEBUG
-  int _cache_hits;
-  int _cache_misses;
-  int _cache_adds;
-  int _cache_new_adds;
-  int _cache_dels;
-  int _total_cache_size;
-  int _num_states;
-  double _last_reset;
+  int _cache_hits = 0;
+  int _cache_misses = 0;
+  int _cache_adds = 0;
+  int _cache_new_adds = 0;
+  int _cache_dels = 0;
+  int _total_cache_size = 0;
+  int _num_states = 0;
+  double _last_reset = 0.0;
 
-  bool _cache_report;
-  double _cache_report_interval;
+  bool _cache_report = false;
+  double _cache_report_interval = 0.0;
 #endif  // NDEBUG
 };
 
diff --git a/panda/src/pgraph/nodePath.I b/panda/src/pgraph/nodePath.I
index 8860fff331..74bcc01bd9 100644
--- a/panda/src/pgraph/nodePath.I
+++ b/panda/src/pgraph/nodePath.I
@@ -16,9 +16,9 @@
  */
 INLINE NodePath::
 NodePath() :
-  _error_type(ET_ok)
+  _error_type(ET_ok),
+  _backup_key(0)
 {
-  _backup_key = 0;
 }
 
 /**
diff --git a/panda/src/putil/loaderOptions.I b/panda/src/putil/loaderOptions.I
index b15780c847..6e407e7840 100644
--- a/panda/src/putil/loaderOptions.I
+++ b/panda/src/putil/loaderOptions.I
@@ -14,7 +14,7 @@
 /**
  *
  */
-INLINE LoaderOptions::
+constexpr LoaderOptions::
 LoaderOptions(int flags, int texture_flags) :
   _flags(flags),
   _texture_flags(texture_flags),
@@ -23,29 +23,6 @@ LoaderOptions(int flags, int texture_flags) :
 {
 }
 
-/**
- *
- */
-INLINE LoaderOptions::
-LoaderOptions(const LoaderOptions &copy) :
-  _flags(copy._flags),
-  _texture_flags(copy._texture_flags),
-  _texture_num_views(copy._texture_num_views),
-  _auto_texture_scale(copy._auto_texture_scale)
-{
-}
-
-/**
- *
- */
-INLINE void LoaderOptions::
-operator = (const LoaderOptions &copy) {
-  _flags = copy._flags;
-  _texture_flags = copy._texture_flags;
-  _texture_num_views = copy._texture_num_views;
-  _auto_texture_scale = copy._auto_texture_scale;
-}
-
 /**
  *
  */
diff --git a/panda/src/putil/loaderOptions.h b/panda/src/putil/loaderOptions.h
index 50c73f983e..971353e723 100644
--- a/panda/src/putil/loaderOptions.h
+++ b/panda/src/putil/loaderOptions.h
@@ -49,9 +49,7 @@ PUBLISHED:
   };
 
   LoaderOptions(int flags = LF_search | LF_report_errors);
-  INLINE LoaderOptions(int flags, int texture_flags);
-  INLINE LoaderOptions(const LoaderOptions &copy);
-  INLINE void operator = (const LoaderOptions &copy);
+  constexpr LoaderOptions(int flags, int texture_flags);
 
   INLINE void set_flags(int flags);
   INLINE int get_flags() const;