From a793802ca08ba159558e36db95f8242fb0f44156 Mon Sep 17 00:00:00 2001
From: Mark Harfouche <mark.harfouche@gmail.com>
Date: Tue, 1 Nov 2022 21:02:17 -0400
Subject: [PATCH] Make the conversion from dtype to subclass just a little
 faster (#49393)

Use kind to speed up dtype decision
---
 pandas/core/indexes/base.py | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/pandas/core/indexes/base.py b/pandas/core/indexes/base.py
index d8300bb29c274..590fb187e9a1f 100644
--- a/pandas/core/indexes/base.py
+++ b/pandas/core/indexes/base.py
@@ -106,7 +106,6 @@
     is_scalar,
     is_signed_integer_dtype,
     is_string_dtype,
-    is_unsigned_integer_dtype,
     needs_i8_conversion,
     pandas_dtype,
     validate_all_hashable,
@@ -591,20 +590,20 @@ def _dtype_to_subclass(cls, dtype: DtypeObj):
 
             return TimedeltaIndex
 
-        elif is_float_dtype(dtype):
+        elif dtype.kind == "f":
             from pandas.core.api import Float64Index
 
             return Float64Index
-        elif is_unsigned_integer_dtype(dtype):
+        elif dtype.kind == "u":
             from pandas.core.api import UInt64Index
 
             return UInt64Index
-        elif is_signed_integer_dtype(dtype):
+        elif dtype.kind == "i":
             from pandas.core.api import Int64Index
 
             return Int64Index
 
-        elif dtype == _dtype_obj:
+        elif dtype.kind == "O":
             # NB: assuming away MultiIndex
             return Index