- Make use of create_multi to speed up.

- Add an option in the wizard 'Quantity > 0' to speed up the report

stock_report_quantity_by_location/wizards/stock_report_quantity_by_location.py

@@ -10,6 +10,11 @@ class StockReportByLocationPrepare(models.TransientModel):
     location_ids = fields.Many2many(
         comodel_name="stock.location", string="Locations", required=True
     )
+    with_quantity = fields.Boolean(
+        string="Quantity > 0",
+        default=True,
+        help="Show only the products that have existing quantity on hand",
+    )
 
     def open(self):
         self.ensure_one()
@@ -42,8 +47,11 @@ class StockReportByLocationPrepare(models.TransientModel):
                 for quant_group in quant_groups
             }
             products = self.env["product.product"].search([("type", "=", "product")])
+            vals_list = []
             for product in products:
-                r = self.env["stock.report.quantity.by.location"].create(
+                quantity = mapping.get(product.id, 0.0)
+                if (self.with_quantity and quantity) or not self.with_quantity:
+                    vals_list.append(
                         {
                             "product_id": product.id,
                             "product_category_id": product.categ_id.id,
@@ -54,8 +62,8 @@ class StockReportByLocationPrepare(models.TransientModel):
                             "default_code": product.default_code,
                         }
                     )
-                recs.append(r.id)
-        return recs
+            recs = self.env["stock.report.quantity.by.location"].create(vals_list)
+        return recs.ids
 
 
 class StockReportQuantityByLocation(models.TransientModel):

stock_report_quantity_by_location/wizards/stock_report_quantity_by_location_views.xml

@@ -13,25 +13,42 @@ License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
                     <group>
                         <field name="location_ids" widget="many2many_tags" />
                     </group>
+                    <group>
+                        <field name="with_quantity" />
+                    </group>
                 </group>
                 <footer>
-                    <button name="open" string="Retrieve the Inventory Quantities" type="object" class="btn-primary"/>
+                    <button
+                        name="open"
+                        string="Retrieve the Inventory Quantities"
+                        type="object"
+                        class="btn-primary"
+                    />
                     <button string="Cancel" class="btn-default" special="cancel" />
                 </footer>
             </form>
         </field>
     </record>
-    <record id="action_stock_report_quantity_by_location_prepare" model="ir.actions.act_window">
+    <record
+        id="action_stock_report_quantity_by_location_prepare"
+        model="ir.actions.act_window"
+    >
         <field name="name">Inventory By Location</field>
         <field name="res_model">stock.report.quantity.by.location.prepare</field>
         <field name="view_mode">form</field>
-        <field name="view_id" ref="stock_report_quantity_by_location_prepare_form_view"/>
+        <field
+            name="view_id"
+            ref="stock_report_quantity_by_location_prepare_form_view"
+        />
         <field name="target">new</field>
     </record>
-    <menuitem id="menu_quantity_by_location" name="Inventory by Location"
+    <menuitem
+        id="menu_quantity_by_location"
+        name="Inventory by Location"
         parent="stock.menu_warehouse_report"
         action="action_stock_report_quantity_by_location_prepare"
-              groups="stock.group_stock_manager"/>
+        groups="stock.group_stock_manager"
+    />
 
     <record id="stock_report_quantity_by_location_tree_view" model="ir.ui.view">
         <field name="name">Stock Report Quantity By Location Form</field>
@@ -67,9 +84,19 @@ License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
                 <field name="default_code" />
                 <field name="location_id" groups="stock.group_stock_multi_locations" />
                 <field name="product_category_id" />
-                <filter name="quantity_gt_zero" string="Quantity > 0" domain="[('quantity', '>', '0.0')]"/>
+                <filter
+                    name="quantity_gt_zero"
+                    string="Quantity > 0"
+                    domain="[('quantity', '>', '0.0')]"
+                />
                 <group expand="0" string="Group By">
-                    <filter name="location" string="Location" domain="[]" context="{'group_by':'location_id'}" help="Group by Location"/>
+                    <filter
+                        name="location"
+                        string="Location"
+                        domain="[]"
+                        context="{'group_by':'location_id'}"
+                        help="Group by Location"
+                    />
                 </group>
             </search>
         </field>