FIX: Fixed some issues around vb_suite

* temporary variable ``bmark`` in groupby was collected as Benchmark
* indexing module had same name ('series_getitem_scalar') Benchmarks
* VB_DIR pointed wrong directory

Author: Junya Hayashi

vb_suite/groupby.py

@@ -559,3 +559,6 @@ def inject_bmark_into_globals(bmark):
     for func_name in no_arg_func_list:
         bmark = make_large_ngroups_bmark(ngroups, func_name)
         inject_bmark_into_globals(bmark)
+
+# avoid bmark to be collected as Benchmark object
+del bmark

vb_suite/indexing.py

@@ -15,19 +15,18 @@
 dt = ts.index[500]
 """
 statement = "ts[dt]"
-
 bm_getitem = Benchmark(statement, setup, ncalls=100000,
-                       name='series_getitem_scalar')
+                       name='time_series_getitem_scalar')
 
 setup = common_setup + """
 index = tm.makeStringIndex(1000)
 s = Series(np.random.rand(1000), index=index)
 idx = index[100]
 """
 statement = "s.get_value(idx)"
-bm_df_getitem3 = Benchmark(statement, setup,
-                           name='series_get_value',
-                           start_date=datetime(2011, 11, 12))
+bm_get_value = Benchmark(statement, setup,
+                         name='series_get_value',
+                         start_date=datetime(2011, 11, 12))
 
 
 setup = common_setup + """

vb_suite/test_perf.py

@@ -56,7 +56,7 @@
 from pandas import DataFrame, Series
 
 from suite import REPO_PATH
-VB_DIR = os.path.dirname(os.path.abspath(__file__))
+VB_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 DEFAULT_MIN_DURATION = 0.01
 HEAD_COL="head[ms]"
 BASE_COL="base[ms]"
@@ -505,7 +505,7 @@ def main():
 
     print("\n")
 
-    # move away from the pandas root dit, to avoid possible import
+    # move away from the pandas root dir, to avoid possible import
     # surprises
     os.chdir(os.path.dirname(os.path.abspath(__file__)))