TEST-#2699: add append benchmark

Signed-off-by: Anatoly Myachev <anatoly.myachev@intel.com>

asv_bench/benchmarks/benchmarks.py

@@ -225,6 +225,27 @@ def time_concat(self, shapes, how, axis):
             raise NotImplementedError
 
 
+class TimeAppend:
+    param_names = ["shapes", "sort"]
+    params = [
+        BINARY_OP_DATA_SIZE[ASV_DATASET_SIZE],
+        [False, True],
+    ]
+
+    def setup(self, shapes, sort):
+        self.df1 = generate_dataframe(
+            ASV_USE_IMPL, "int", *shapes[0], RAND_LOW, RAND_HIGH
+        )
+        self.df2 = generate_dataframe(
+            ASV_USE_IMPL, "int", *shapes[1], RAND_LOW, RAND_HIGH
+        )
+        if sort:
+            self.df1.columns = self.df1.columns[::-1]
+
+    def time_append(self, shapes, sort):
+        execute(self.df1.append(self.df2, sort=sort))
+
+
 class TimeBinaryOp:
     param_names = ["shapes", "binary_op", "axis"]
     params = [