Hi,

Enabling Purchase Templates or Call for Tenders in Odoo doesn't directly slow down the system; these features are built to help. However, if you're dealing with a very large number of procurement operations, like creating thousands of purchase orders or comparing many vendor offers with lots of items, the sheer volume of data and processing can put a strain on your Odoo system. To avoid performance issues in such large-scale scenarios, it's crucial to have strong server resources, efficient workflows, and good database management.