Memoize the common_bootstrap_payload (apache#21018)

Try patch

Co-authored-by: Bogdan Kyryliuk <bogdankyryliuk@dropbox.com>

superset/views/base.py

@@ -70,6 +70,7 @@
     SupersetException,
     SupersetSecurityException,
 )
+from superset.extensions import cache_manager
 from superset.models.helpers import ImportExportMixin
 from superset.reports.models import ReportRecipientType
 from superset.superset_typing import FlaskResponse
@@ -339,8 +340,13 @@ def menu_data() -> Dict[str, Any]:
     }
 
 
+@cache_manager.cache.memoize(timeout=60)
 def common_bootstrap_payload() -> Dict[str, Any]:
-    """Common data always sent to the client"""
+    """Common data always sent to the client
+
+    The function is memoized as the return value only changes based
+    on configuration and feature flag values.
+    """
     messages = get_flashed_messages(with_categories=True)
     locale = str(get_locale())
 

tests/integration_tests/core_tests.py

@@ -62,7 +62,7 @@
 from superset.db_engine_specs.base import BaseEngineSpec
 from superset.db_engine_specs.mssql import MssqlEngineSpec
 from superset.exceptions import SupersetException
-from superset.extensions import async_query_manager
+from superset.extensions import async_query_manager, cache_manager
 from superset.models import core as models
 from superset.models.annotations import Annotation, AnnotationLayer
 from superset.models.dashboard import Dashboard
@@ -1443,6 +1443,8 @@ def test_feature_flag_serialization(self):
         """
         Functions in feature flags don't break bootstrap data serialization.
         """
+        # feature flags are cached
+        cache_manager.cache.clear()
         self.login()
 
         encoded = json.dumps(