[IMP] sale_stock: Add query counter test on SO batch creation

This is be a correct metric to ensure the onchanges convertion
into compute methods using precompute attribute is going
in the right direction.

addons/sale_stock/tests/__init__.py

@@ -10,3 +10,4 @@ from . import test_sale_order_dates
 from . import test_sale_stock_multicompany
 from . import test_sale_stock_accrued_entries
 from . import test_sale_stock_access_rights
+from . import test_create_perf

addons/sale_stock/tests/test_create_perf.py

@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+import logging
+import time
+
+from odoo.tests import common, tagged
+from odoo.tests.common import users, warmup
+
+_logger = logging.getLogger(__name__)
+
+
+@tagged('so_batch_perf')
+class TestPERF(common.TransactionCase):
+
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.ENTITIES = 50
+
+        cls.products = cls.env['product.product'].create([{
+            'name': 'Product %s' % i,
+            'list_price': 1 + 10 * i,
+            'type': 'service',
+        } for i in range(10)])
+
+        cls.partners = cls.env['res.partner'].create([{
+            'name': 'Partner %s' % i,
+        } for i in range(cls.ENTITIES)])
+
+        cls.salesmans = cls.env.ref('base.user_admin') | cls.env.ref('base.user_demo')
+
+        cls.env['base'].flush()
+
+    @users('admin')
+    @warmup
+    def test_sales_orders_batch_creation_perf(self):
+        MSG = "Model %s, %i records, %s, time %.2f"
+
+        vals_list = [{
+            "partner_id": self.partners[i].id,
+            "user_id": self.salesmans[i % 2].id,
+            "order_line": [
+                (0, 0, {"display_type": "line_note", "name": "NOTE"})
+            ] + [
+                (0, 0, {'product_id': product.id}) for product in self.products
+            ],
+        } for i in range(self.ENTITIES)]
+
+        with self.assertQueryCount(admin=2753):
+            t0 = time.time()
+            self.env["sale.order"].create(vals_list)
+            t1 = time.time()
+            _logger.info(MSG, 'sale.order', self.ENTITIES, "BATCH", t1 - t0)
+            self.env.cr.flush()
+            _logger.info(MSG, 'sale.order', self.ENTITIES, "FLUSH", time.time() - t1)