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During the process of generatinng report for problem responses, there are two places where N + 1 query problem exist. In both cases, `StudentModule` objects are fetched and looped over where `student.username` field for each object is accessed. This result in a seperate database call to get the username for each student response. This problem is fixed by creating a join to fetch the related table in the original query using `select_related`. In a test conducted on report having 5000 `StudentModule` objects, the number of queries for the request reduced from 8363 to 29. The total time taken for the task reduced from 23764 ms to 7394 ms.
Status: Active Development Responsibilities ================ The courseware djangoapp is responsible for presenting course content to learners. Glossary ======== More Documentation ================== `Architectural Decision Records <https://github.com/openedx/edx-platform/tree/master/lms/djangoapps/courseware/docs/decisions>`_