One of Django's main benefits is the built-in models and object-relational mapper (ORM). It provides a quick-to-use, common interface for data operations for your models and can handle most queries pretty easily. It can also do some tricky SQL once you understand the syntax. Django’s database layer provides various ways to help developers get the most out of their databases.

https://docs.djangoproject.com/en/dev/ref/models/querysets/#django.db.models.query.QuerySet.prefetch_related

https://concisecoder.io/2018/11/04/django-orm-optimization-tips/ https://medium.com/@hansonkd/performance-problems-in-the-django-orm-1f62b3d04785

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