sale_delivery_date: add cache to improve performance

This avoids a lot of SQL requests (several hundreds on a SO with 20-30 lines),
and reduce the time needed to open orders.

sale_delivery_date/models/res_partner.py

@@ -4,7 +4,7 @@
 
 from pytz import timezone, utc
 
-from odoo import _, fields, models
+from odoo import _, fields, models, tools
 from odoo.exceptions import UserError
 from odoo.tools.date_utils import date_range
 
@@ -91,6 +91,12 @@ def get_next_workdays_datetime(self, from_datetime, to_datetime):
             if date.weekday() < 5
         ]
 
+    @tools.ormcache("weekday_number")
+    def _get_weekday(self, weekday_number):
+        return self.env["time.weekday"].search(
+            [("name", "=", weekday_number)], limit=1
+        )
+
     def get_next_windows_start_datetime(self, from_datetime, to_datetime):
         """Get all delivery windows start time.
 
@@ -117,9 +123,7 @@ def get_next_windows_start_datetime(self, from_datetime, to_datetime):
             from_datetime_tz, to_datetime_tz, timedelta(days=1)
         ):
             this_weekday_number = this_datetime.weekday()
-            this_weekday = self.env["time.weekday"].search(
-                [("name", "=", this_weekday_number)], limit=1
-            )
+            this_weekday = self._get_weekday(this_weekday_number)
             # Sort by start time to ensure the window we'll find will be the first
             # one for the weekday
             this_weekday_windows = self.delivery_time_window_ids.filtered(

sale_delivery_date/models/sale_order_line.py

@@ -7,7 +7,7 @@
 import pytz
 from pytz import UTC, timezone
 
-from odoo import api, models
+from odoo import api, models, tools
 
 from odoo.addons.partner_tz.tools import tz_utils
 
@@ -368,6 +368,7 @@ def _preparation_date_from_expedition_date(
     # ======
 
     @api.model
+    @tools.ormcache("date_from", "delay", "calendar")
     def _add_delay(self, date_from, delay, calendar=False):
         if calendar:
             # Plan days is expecting a number of days, not a delay.
@@ -377,6 +378,7 @@ def _add_delay(self, date_from, delay, calendar=False):
         return date_from + timedelta(days=delay)
 
     @api.model
+    @tools.ormcache("date_from", "delay", "calendar")
     def _deduct_delay(self, date_from, delay, calendar=False):
         if calendar:
             days = self._delay_to_days(delay)
@@ -399,6 +401,7 @@ def _apply_cutoff(self, date_order, cutoff, keep_same_day=False):
         return self._get_utc_cutoff_datetime(cutoff, date_order, keep_same_day)
 
     @api.model
+    @tools.ormcache("date_start", "calendar")
     def _postpone_to_working_day(self, date_start, calendar=False):
         """Returns the nearest calendar's working day"""
         if calendar:
@@ -415,6 +418,7 @@ def _apply_customer_window(self, delivery_date, partner):
         return partner.next_delivery_window_start_datetime(from_date=delivery_date)
 
     @api.model
+    @tools.ormcache("earliest_work_end", "latest_expedition_date", "calendar")
     def _get_latest_work_end_from_date_range(
         self, earliest_work_end, latest_expedition_date, calendar=False
     ):