Dataset insertion benchmark

asv_bench/benchmarks/dataset_creation.py

@@ -0,0 +1,19 @@
+import xarray as xr
+
+from . import parameterized
+
+
+class Creation:
+    def setup(self, elements):
+        self.datasets = {}
+        # Dictionary insertion is fast(er) than xarray.Dataser insertion
+        d = {}
+        for i in range(elements):
+            d[f"var{i}"] = i
+        self.dataset = xr.merge([d])
+
+    @parameterized(["elements"], [(0, 10, 100, 1000)])
+    def time_dataset_creation(self, elements):
+        dataset = self.dataset
+        for i in range(5):
+            dataset[f"new_var{i}"] = i