Added benchmark for wide frame

Author: WillAyd

asv_bench/benchmarks/groupby.py

@@ -420,6 +420,7 @@ def setup(self, dtype, method, application):
             key = date_range("1/1/2011", periods=size, freq="s")
 
         df = DataFrame({"values": values, "key": key})
+        self.wide_grp = DataFrame(np.ones((1, 10_000))).groupby([1])
 
         if application == "transform":
             if method == "describe":
@@ -437,6 +438,9 @@ def time_dtype_as_group(self, dtype, method, application):
     def time_dtype_as_field(self, dtype, method, application):
         self.as_field_method()
 
+    def time_wide(self):
+        self.wide_grp.sum()
+
 
 class RankWithTies:
     # GH 21237