Performance regression in replace.ReplaceList.time_replace_list_one_match

[TomAugspurger]

https://pandas.pydata.org/speed/pandas/index.html#replace.ReplaceList.time_replace_list_one_match?p-inplace=False&commits=6388370eb313244ba0e4cd8215dcdbfdabb7004b-88d5f1264bf58b518b7cce39230d018db59b3c72 points to 6388370...88d5f12.

#34048 mentions DataFrame.replace. cc @simonjayhawkins.

https://pandas.pydata.org/speed/pandas/index.html#replace.FillNa.time_replace?p-inplace=True&commits=6388370eb313244ba0e4cd8215dcdbfdabb7004b-88d5f1264bf58b518b7cce39230d018db59b3c72 is probably the same cause.