Django templates are slow. Template-timings is a panel for Django-debug-toolbar shows you exactly how slow each of your templates and blocks are in your Django application, displaying the time each template (including templates rendered via {% extends %} and {% include %}) and block took to render. It also includes the number of SQL statements each template or block executed as well as the min/max time.
Django doesn't give you much insight as to why a template might take a long time to render. A block inside a template I was using added significant overhead in a non-obvious way, and I wished I had something like this to show exactly where the bottlekneck was.
Install via pip (pip install django-debug-toolbar-template-timings). Then add 'template_timings_panel.panels.TemplateTimings.TemplateTimings' to your DEBUG_TOOLBAR_PANELS, and also add 'template_timings_panel' to your INSTALLED_APPS.
Configuration is optional. There are two settings you can configure (the values below are the default):
PRINT_TIMINGS = False # Print timings to the console
IGNORED_TEMPLATES = ["debug_toolbar/*"] # Ignore these templates from the output