PERF: Restore old performances with .isin() on columns typed as np.uint64

Author: pbrochart

pandas/core/algorithms.py

@@ -56,6 +56,7 @@
     is_object_dtype,
     is_signed_integer_dtype,
     needs_i8_conversion,
+    is_dtype_equal,
 )
 from pandas.core.dtypes.concat import concat_compat
 from pandas.core.dtypes.dtypes import (
@@ -511,6 +512,7 @@ def isin(comps: ListLike, values: ListLike) -> npt.NDArray[np.bool_]:
             len(values) > 0
             and values.dtype.kind in "iufcb"
             and not is_signed_integer_dtype(comps)
+            and not is_dtype_equal(values, comps)
         ):
             # GH#46485 Use object to avoid upcast to float64 later
             # TODO: Share with _find_common_type_compat