PERF: test indexes concat

Author: toobaz

Diff for: asv_bench/benchmarks/index_concat.py

@@ -0,0 +1,20 @@
+from .pandas_vb_common import *
+
+
+class Int64Indexing(object):
+    goal_time = 0.2
+
+    def setup(self):
+        idx = Index(range(10))
+        self.ridx = [idx] * 10
+        self.iidx = [idx.astye(int)] * 10
+        self.oidx = [idx.astype(str)] * 10
+
+    def time_concat_range(self):
+        self.ridx[0].append(self.ridx[1:])
+
+    def time_concat_int(self):
+        self.iidx[0].append(self.iidx[1:])
+
+    def time_concat_obj(self):
+        self.oidx[0].append(self.oidx[1:])