Merge remote-tracking branch 'origin/master' into bf-cython

* origin/master: (22 commits)
  BUG: astype falsely converts inf to integer (GH14265) (pandas-dev#14343)
  BUG: Apply min_itemsize to index even when not appending
  DOC: warning section on memory overflow when joining/merging dataframes on index with duplicate keys (pandas-dev#14788)
  BLD: missing - on secure
  BLD: new access token on pandas-dev
  TST: Test DatetimeIndex weekend offset (pandas-dev#14853)
  BLD: escape GH_TOKEN in build_docs
  TST: Correct results with np.size and crosstab (pandas-dev#4003) (pandas-dev#14755)
  Frame benchmarking sum instead of mean (pandas-dev#14824)
  CLN: lint of test_base.py
  BUG: Allow TZ-aware DatetimeIndex in merge_asof() (pandas-dev#14844)
  BUG: GH11847 Unstack with mixed dtypes coerces everything to object
  TST: skip testing on windows for specific formatting which sometimes hangs (pandas-dev#14851)
  BLD: try new gh token for pandas-docs
  CLN/PERF: clean-up of the benchmarks (pandas-dev#14099)
  ENH: add timedelta as valid type for interpolate with method='time' (pandas-dev#14799)
  DOC: add section on groupby().rolling/expanding/resample (pandas-dev#14801)
  TST: add test to confirm GH14606 (specify category dtype for empty) (pandas-dev#14752)
  BLD: use org name in build-docs.sh
  BF(TST): use = (native) instead of < (little endian) for target data types (pandas-dev#14832)
  ...

Author: yarikoptic

.travis.yml

@@ -16,7 +16,7 @@ env:
   global:
 
   # pandas-docs-travis GH
-  - secure: "UJK7kUtkcnV9PFP4IBXAvgmRQKdwARlfqF4UZQ5tBwrpnD1a3n7FLBijcuXQ3jkvwpEc/FZB9RJDXmsqYXJPvq3BC++2Cv2tFDvKr/c+y8KffszAyVk47jKEHMNmGgauwaNMggsE/rH8YHe4so9LsJHTRbzmLo8lXPNTldoIu5s="
+  - secure: "YvvTc+FrSYHgdxqoxn9s8VOaCWjvZzlkaf6k55kkmQqCYR9dPiLMsot1F96/N7o3YlD1s0znPQCak93Du8HHi/8809zAXloTaMSZrWz4R4qn96xlZFRE88O/w/Z1t3VVYpKX3MHlCggBc8MtXrqmvWKJMAqXyysZ4TTzoiJDPvE="
 
 git:
     # for cloning

asv_bench/benchmarks/algorithms.py

@@ -3,7 +3,7 @@
 from pandas.util import testing as tm
 
 
-class algorithm(object):
+class Algorithms(object):
     goal_time = 0.2
 
     def setup(self):
@@ -24,21 +24,28 @@ def setup(self):
         self.arrneg = np.arange(-1000000, 0)
         self.arrmixed = np.array([1, -1]).repeat(500000)
 
-    def time_int_factorize(self):
+        # match
+        self.uniques = tm.makeStringIndex(1000).values
+        self.all = self.uniques.repeat(10)
+
+    def time_factorize_int(self):
         self.int.factorize()
 
-    def time_float_factorize(self):
+    def time_factorize_float(self):
         self.int.factorize()
 
-    def time_int_unique_duplicated(self):
+    def time_duplicated_int_unique(self):
         self.int_unique.duplicated()
 
-    def time_int_duplicated(self):
+    def time_duplicated_int(self):
         self.int.duplicated()
 
-    def time_float_duplicated(self):
+    def time_duplicated_float(self):
         self.float.duplicated()
 
+    def time_match_strings(self):
+        pd.match(self.all, self.uniques)
+
     def time_add_overflow_pos_scalar(self):
         self.checked_add(self.arr, 1)
 
@@ -58,7 +65,7 @@ def time_add_overflow_mixed_arr(self):
         self.checked_add(self.arr, self.arrmixed)
 
 
-class hashing(object):
+class Hashing(object):
     goal_time = 0.2
 
     def setup(self):

asv_bench/benchmarks/attrs_caching.py

@@ -1,23 +1,32 @@
 from .pandas_vb_common import *
+from pandas.util.decorators import cache_readonly
 
 
-class getattr_dataframe_index(object):
+class DataFrameAttributes(object):
     goal_time = 0.2
 
     def setup(self):
         self.df = DataFrame(np.random.randn(10, 6))
         self.cur_index = self.df.index
 
-    def time_getattr_dataframe_index(self):
+    def time_get_index(self):
         self.foo = self.df.index
 
+    def time_set_index(self):
+        self.df.index = self.cur_index
+
 
-class setattr_dataframe_index(object):
+class CacheReadonly(object):
     goal_time = 0.2
 
     def setup(self):
-        self.df = DataFrame(np.random.randn(10, 6))
-        self.cur_index = self.df.index
 
-    def time_setattr_dataframe_index(self):
-        self.df.index = self.cur_index
+        class Foo:
+
+            @cache_readonly
+            def prop(self):
+                return 5
+        self.obj = Foo()
+
+    def time_cache_readonly(self):
+        self.obj.prop