add timed decorator for perf tracking

management/commands/_import_utils.py

@@ -1,6 +1,8 @@
 #!/usr/bin/env python3
 
 import json
+import time
+from collections import defaultdict
 
 from django.core.management.base import BaseCommand
 from collections import defaultdict
@@ -10,6 +12,20 @@ from django.db import transaction
 from polymorphic.models import PolymorphicModel
 
 
+def timed(method):
+    """"
+    A simple decorator to measure time elapsed in class function (hence the args[0])
+    """
+    def _timed(*args, **kw):
+        ts = time.time()
+        result = method(*args, **kw)
+        te = time.time()
+        args[0].print_success(f"{method.__name__} executed ({te-ts:.2f}s)")
+        return result
+
+    return _timed
+
+
 class ImportCommand(BaseCommand):
     """
     Generic command for import of NK15 database