Django Performance

Fixing Django ORM Queries That Ignore Database Indexes at Scale

Your Django application performs well during development but slows dramatically in production as data grows. The issue may not be the ORM itself—it may be that your queries aren't using database indexes efficiently. Learn why indexes are ignored, how to identify slow queries, and how to optimize

Jul 28, 2026 6m read 👁 0

Django ORM N+1 Queries in Serializers: Detecting and Fixing Them

N+1 query bugs in Django serializers can silently turn a fast endpoint into a database-hammering bottleneck. Learn how to detect them with django-debug-toolbar and nplusone, then fix them permanently with select_related and prefetch_related.

Jun 28, 2026 8m read 👁 19

Django Signals Firing Multiple Times: Causes and How to Fix Them

Your Django signal handler is running twice, three times, or more — and you have no idea why. This guide breaks down every common cause, from duplicate receiver registration to AppConfig mistakes, and shows you exactly how to stop it.

Jun 25, 2026 11m read 👁 17

How to Optimize Django REST APIs for Performance (Complete DRF Guide 2026)

Django REST Framework (DRF) makes it easy to build powerful APIs, but performance issues can quickly emerge as your application grows. Slow database queries, inefficient serializers, missing indexes, and lack of caching can significantly impact API response times and user experience.

Jun 17, 2026 5m read 👁 30