Django 3 Web Development Cookbook - Fourth Edition

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Gravatar images are quite small and relatively quick to download. If you were downloading bigger images from a different service, you could use Celery or Huey task queues to retrieve the images in the background. You can learn about Celery at https://docs.celeryproject.org/en/latest/django/first-steps-with-django.html, and about Huey at https://huey.readthedocs.io/en/0.4.9/django.html.