[IMP] core: optimize `model._setup_base()`

Simplify the code to retrieve fields on a class.
Simplify the class attribute that lists the class' proper fields.
Optimize `model._add_inherited_fields()`.
Optimize `resolve_mro` by using classes instead of recordsets.

This saves 3.5% of the total installation time.

X-original-commit: 89ab71905cb6c5d3beda5eac357f8592e31aaef8

1 files changed, 7 insertions, 6 deletions

diff --git a/odoo/fields.py b/odoo/fields.py
index 84d1dad8b40..2420f1090b5 100644
--- a/odoo/fields.py
+++ b/odoo/fields.py
@@ -55,12 +55,13 @@ def resolve_mro(model, name, predicate):
         (the ones that appear in the registry) are ignored.
     """
     result = []
-    for cls in type(model).__mro__:
-        if not getattr(cls, 'pool', None) and name in cls.__dict__:
-            value = cls.__dict__[name]
-            if not predicate(value):
-                break
-            result.append(value)
+    for cls in model._model_classes:
+        value = cls.__dict__.get(name, Default)
+        if value is Default:
+            continue
+        if not predicate(value):
+            break
+        result.append(value)
     return result