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PERF: keep using ObjectEngine for ExtensionArrays for 1.5 #48472

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Sep 9, 2022
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PERF: keep using ObjectEngine for ExtensionArrays for 1.5 #48472

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3 changes: 3 additions & 0 deletions pandas/core/indexes/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5155,6 +5155,9 @@ def _get_engine_target(self) -> ArrayLike:
if isinstance(vals, StringArray):
# GH#45652 much more performant than ExtensionEngine
return vals._ndarray
if type(self) is Index and isinstance(self._values, ExtensionArray):
# TODO(ExtensionIndex): remove special-case, just use self._values
return self._values.astype(object)
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return vals

def _from_join_target(self, result: np.ndarray) -> ArrayLike:
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