Performance regression in tslibs.tz_convert.TimeTZConvert.time_tz_convert_from_utc
https://pandas.pydata.org/speed/pandas/index.html#tslibs.tz_convert.TimeTZConvert.time_tz_convert_from_utc?p-size=1000000&p-tz=datetime.timezone.utc&commits=3701a9b1bfc3ad3890c2fb1fe1974a4768f6d5f8-522f855a38d52763c4e2b07480786163b91dad38

Somewhere in https://github.com/pandas-dev/pandas/compare/3701a9b1bfc3ad3890c2fb1fe1974a4768f6d5f8...522f855a38d52763c4e2b07480786163b91dad38