Template rendering performance

[PetrDlouhy]

I just realised, that if I delete all scribbles from my template, the template rendering times are 100-300 ms shorter (measured by https://pypi.org/project/django-debug-toolbar-template-profiler/ with user logged off). This is significant performance issue for me, since it can be 1/3 or more of the whole request time.

I will investigate this further.