Add peakmem benchmarks for rolling (pandas-dev#28255)

Author: mroeschke

asv_bench/benchmarks/rolling.py

@@ -21,6 +21,9 @@ def setup(self, constructor, window, dtype, method):
     def time_rolling(self, constructor, window, dtype, method):
         getattr(self.roll, method)()
 
+    def peakmem_rolling(self, constructor, window, dtype, method):
+        getattr(self.roll, method)()
+
 
 class ExpandingMethods: