From 57a34bb989ab18fc5ba1f740aad06c84064933db Mon Sep 17 00:00:00 2001
From: Julien Castiaux <juc@odoo.com>
Date: Fri, 4 Jun 2021 11:59:15 +0000
Subject: [PATCH] [IMP] base: fields_view_get() benchmark
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A test that calls fields_view_get() on all models while measuring its
performances. Use it along with py-spy and load the generated file in
<https://www.speedscope.app/>

    py-spy record -F -r 200 --format speedscope -o speedscope.json -- \
      python3 odoo-bin -d <db> --test-tags render_all_views --stop-after-init

Task: 2463632

Co-authored-by: Raphaël Collet <rco@odoo.com>
---
 odoo/addons/base/tests/test_views.py | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/odoo/addons/base/tests/test_views.py b/odoo/addons/base/tests/test_views.py
index 000c609498e..17e93c674dc 100644
--- a/odoo/addons/base/tests/test_views.py
+++ b/odoo/addons/base/tests/test_views.py
@@ -1,9 +1,10 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 import ast
+import logging
+import time
 
 from functools import partial
-import logging
 
 from lxml import etree
 from lxml.builder import E
@@ -3042,3 +3043,26 @@ class TestAllViews(common.TransactionCase):
                 _logger.info('checked %s/%s views', index, len(views))
             with self.subTest(name=view.name):
                 view._check_xml()
+
+@common.tagged('post_install', '-at_install', '-standard', 'render_all_views')
+class TestRenderAllViews(common.TransactionCase):
+
+    @common.users('demo', 'admin')
+    def test_render_all_views(self):
+        env = self.env(context={'lang': 'en_US'})
+        count = 0
+        elapsed = 0
+        for model in env.values():
+            if not model._abstract and model.check_access_rights('read', False):
+                with self.subTest(model=model):
+                    times = []
+                    for _ in range(5):
+                        model.invalidate_cache()
+                        before = time.perf_counter()
+                        model.fields_view_get()
+                        times.append(time.perf_counter() - before)
+                    count += 1
+                    elapsed += min(times)
+
+        _logger.info('Rendered %d views as %s using (best of 5) %ss',
+            count, self.env.user.name, elapsed)