New submission from ttrd :
After upgrading from Python 3.7.3 to Python 3.7.4, we noticed an increased
runtime of about 50% in some tests of our application.
After some testing we constructed the following hypothesis: Accessing instance
attributes of classes that define a custom metaclass take
ttrd added the comment:
I just ran the test with Python 3.7.5: As expected, I got the same results as
in Python 3.7.4.
Nevertheless, thanks for the response. So we will stay with Python 3.7.3 for
now and switch to Python 3.8 as soon as possible
