This commit modifies most of the usages of read_group and uses _read_group instead. _read_group doesn't join automatically on the many2one fields when no order_by is specified, making it more performant when the "name" of the many2one is not relevant, which is the case for most back-end cases closes odoo/odoo#84908 Task-id: 2479334 Related: odoo/enterprise#24877 Signed-off-by: Raphael Collet <rco@odoo.com>