add asv tests

Author: realead

asv_bench/benchmarks/series_methods.py

@@ -146,12 +146,24 @@ class ValueCounts:
     param_names = ["N", "dtype"]
 
     def setup(self, N, dtype):
-        self.s = Series(np.random.randint(0, N, size=10 * N)).astype(dtype)
+        self.s = Series(np.random.randint(0, N, size=10 * N)).astype("object")
 
     def time_value_counts(self, N, dtype):
         self.s.value_counts()
 
 
+class ValueCountsObjectDropNAFalse:
+
+    params = [10 ** 3, 10 ** 4, 10 ** 5]
+    param_names = ["N"]
+
+    def setup(self, N):
+        self.s = Series(np.random.randint(0, N, size=10 * N)).astype("object")
+
+    def time_value_counts(self, N):
+        self.s.value_counts(dropna=False)
+
+
 class Mode:
 
     params = [[10 ** 3, 10 ** 4, 10 ** 5], ["int", "uint", "float", "object"]]
@@ -164,6 +176,18 @@ def time_mode(self, N, dtype):
         self.s.mode()
 
 
+class ModeObjectDropNAFalse:
+
+    params = [10 ** 3, 10 ** 4, 10 ** 5]
+    param_names = ["N"]
+
+    def setup(self, N):
+        self.s = Series(np.random.randint(0, N, size=10 * N)).astype("object")
+
+    def time_mode(self, N):
+        self.s.mode(dropna=False)
+
+
 class Dir:
     def setup(self):
         self.s = Series(index=tm.makeStringIndex(10000))