I was benchmarking a render and I noticed that the use of inspect.isawaitable really slows things down:

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
    22920    0.024    0.000    0.059    0.000 .../python3.10/inspect.py:348(isawaitable)

Almost 60 milliseconds is spent there, more than any other Python builtin in the profile.

Environment:

• Python version: 3.10
• Jinja version: 3.0.1