Merge pull request #14686 from edx/ormsbee/test_startup_speed_monkeypatch_kombu

Test speedup: Monkey patch Kombu entrypoints fn.

cms/__init__.py

@@ -4,6 +4,17 @@ registration and discovery can work correctly.
 """
 from __future__ import absolute_import
 
+# We monkey patch Kombu's entrypoints listing because scanning through this
+# accounts for the majority of LMS/Studio startup time for tests, and we don't
+# use custom Kombu serializers (which is what this is for). Still, this is
+# pretty evil, and should be taken out when we update Celery to the next version
+# where it looks like this method of custom serialization has been removed.
+#
+# FWIW, this is identical behavior to what happens in Kombu if pkg_resources
+# isn't available.
+import kombu.utils
+kombu.utils.entrypoints = lambda namespace: iter([])
+
 # This will make sure the app is always imported when
 # Django starts so that shared_task will use this app.
 from .celery import APP as CELERY_APP

lms/__init__.py

@@ -4,6 +4,17 @@ registration and discovery can work correctly.
 """
 from __future__ import absolute_import
 
+# We monkey patch Kombu's entrypoints listing because scanning through this
+# accounts for the majority of LMS/Studio startup time for tests, and we don't
+# use custom Kombu serializers (which is what this is for). Still, this is
+# pretty evil, and should be taken out when we update Celery to the next version
+# where it looks like this method of custom serialization has been removed.
+#
+# FWIW, this is identical behavior to what happens in Kombu if pkg_resources
+# isn't available.
+import kombu.utils
+kombu.utils.entrypoints = lambda namespace: iter([])
+
 # This will make sure the app is always imported when
 # Django starts so that shared_task will use this app.
 from .celery import APP as CELERY_APP