Simon Willison’s Weblog

3rd April 2019 - Link Blog

The problem with laziness: minimising performance issues caused by Django's implicit database queries (via) The ability to accidentally execute further database queries by traversing objects from a Django template is a common source of unexpected performance regressions. django-zen-queries is a neat new library which provides a context manager for disabling database queries during a render (or elsewhere), forcing queries to be explicitly executed in view functions.