- added the patch from Carl Nygard <cnygard@bellatlantic.net>

which allow impressive speed improvement on dataset with large text
   pieces, but at the cost of broken binary compatibility and slightly
   bigger memory usage.  Configure with --with-buffers to activate them,
   they are protected with XML_USE_BUFFER_CONTENT define.
 - added xmlCleanupPredefinedEntities(), memory allocation cleanup
Daniel

entities.c

@@ -148,6 +148,18 @@ void xmlInitializePredefinedEntities(void) {
     }
 }
 
+/**
+ * xmlCleanupPredefinedEntities:
+ *
+ * Cleanup up the predefined entities table.
+ */
+void xmlCleanupPredefinedEntities(void) {
+    if (xmlPredefinedEntities == NULL) return;
+
+    xmlFreeEntitiesTable(xmlPredefinedEntities);
+    xmlPredefinedEntities = NULL;
+}
+
 /**
  * xmlGetPredefinedEntity:
  * @name:  the entity name

entities.h

@@ -88,6 +88,7 @@ void			xmlFreeEntitiesTable	(xmlEntitiesTablePtr table);
 void			xmlDumpEntitiesTable	(xmlBufferPtr buf,
 						 xmlEntitiesTablePtr table);
 xmlEntitiesTablePtr	xmlCopyEntitiesTable	(xmlEntitiesTablePtr table);
+void			xmlCleanupPredefinedEntities(void);
 
 #ifdef __cplusplus
 }

include/libxml/entities.h

@@ -88,6 +88,7 @@ void			xmlFreeEntitiesTable	(xmlEntitiesTablePtr table);
 void			xmlDumpEntitiesTable	(xmlBufferPtr buf,
 						 xmlEntitiesTablePtr table);
 xmlEntitiesTablePtr	xmlCopyEntitiesTable	(xmlEntitiesTablePtr table);
+void			xmlCleanupPredefinedEntities(void);
 
 #ifdef __cplusplus
 }