add add_nodes perf-test

Signed-off-by: Thijs Baaijen <[email protected]>

Author: Thijss

tests/performance/grid_performance_tests.py

@@ -1,13 +1,26 @@
 # SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
 #
 # SPDX-License-Identifier: MPL-2.0
-
 from tests.performance._helpers import do_performance_test
 
 # pylint: disable=missing-function-docstring
 
+def perf_test_add_nodes():
+    setup_code = {
+        "grid" : "from power_grid_model_ds import Grid;"
+        + "from power_grid_model_ds._core.model.arrays import NodeArray;"
+        + "grid = Grid.empty();"
+        + "nodes = NodeArray.zeros({size});"
+    }
+
+    code_to_test = [
+        "grid.append(nodes);"
+    ]
+
+    do_performance_test(code_to_test, [10, 1000, 5000], 100, setup_code)
+
 
-def test_get_downstream_nodes_performance():
+def perf_test_get_downstream_nodes_performance():
     setup_code = {
         "grid": "import numpy as np;"
         + "from power_grid_model_ds.enums import NodeType;"
@@ -27,4 +40,5 @@ def test_get_downstream_nodes_performance():
 
 
 if __name__ == "__main__":
-    test_get_downstream_nodes_performance()
+    # perf_test_get_downstream_nodes_performance()
+    perf_test_add_nodes()