0b6182de383b98fc8b3da5ec58493f930b90b395
Odoo puts in cache all stored fields of a recordset when you access the first stored field not already in cache. In this particular case, Odoo will put in cache all stored fields of 'mail.followers', which is unnecessary and time consuming, especially on models where user follows plenty of records. With thousands of followed records, using a read() when searching on followers is around 2.5 times faster than using mapped(). Record rules based on followers are speed up the same way.
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Odoo
Odoo is a suite of web based open source business apps.
The main Odoo Apps include an Open Source CRM, Website Builder, eCommerce, Warehouse Management, Project Management, Billing & Accounting, Point of Sale, Human Resources, Marketing, Manufacturing, Purchase Management, ...
Odoo Apps can be used as stand-alone applications, but they also integrate seamlessly so you get a full-featured Open Source ERP when you install several Apps.
Getting started with Odoo
For a standard installation please follow the Setup instructions from the documentation.
Then follow the developer tutorials
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