Add a benchmark for Index creation

Author: hmaarrfk

asv_bench/benchmarks/index_object.py

@@ -258,4 +258,15 @@ def peakmem_gc_instances(self, N):
             gc.enable()
 
 
+class Creation:
+    param_names = ["dtype", "size"]
+    params = [["uint8", "uint32", "int32", "float64", "float32"], [0, 1, 10, 100, 200]]
+
+    def setup(self, dtype, size):
+        self.array = np.zeros(size, dtype=dtype)
+
+    def time_creation(self, dtype, size):
+        Index(self.array)
+
+
 from .pandas_vb_common import setup  # noqa: F401 isort:skip