[section] Use custom cardinality checks validation

The cardinality checks are run quite frequently. To reduce the load of
background checks on the Document, custom validations that only run
the specific cardinality checks are used instead.

Author: mpsonntag

odml/section.py

@@ -420,7 +420,12 @@ def _sections_cardinality_validation(self):
         Runs a validation to check whether the sections cardinality
         is respected and prints a warning message otherwise.
         """
-        valid = validation.Validation(self)
+        # This check is run quite frequently so do not run all checks via the default validation
+        # but use a custom validation instead.
+        valid = validation.Validation(self, validate=False, reset=True)
+        valid.register_custom_handler("section", validation.section_sections_cardinality)
+        valid.run_validation()
+
         val_id = validation.IssueID.section_sections_cardinality
 
         # Make sure to display only warnings of the current section
@@ -475,7 +480,12 @@ def _properties_cardinality_validation(self):
         Runs a validation to check whether the properties cardinality
         is respected and prints a warning message otherwise.
         """
-        valid = validation.Validation(self)
+        # This check is run quite frequently so do not run all checks via the default validation
+        # but use a custom validation instead.
+        valid = validation.Validation(self, validate=False, reset=True)
+        valid.register_custom_handler("section", validation.section_properties_cardinality)
+        valid.run_validation()
+
         val_id = validation.IssueID.section_properties_cardinality
 
         # Make sure to display only warnings of the current section