Hi @diogocarvalho17
Thank you for considering WP-Lister for Amazon.
No, it should not slow down your server/site as the tables WP-Lister utilizes are not related to loading pages on your site.
With that said, it is hard to guarantee anything as there are many variables such as type of listings, number of images, amount of traffic, your server specs and configuration, number of plugins you use, type of theme, PHP version, and the list goes on and on.
Your best bet is to give it a try, but we have had very few users run into performance issues using WP-Lister and when they have, it has never been caused by WP-Lister itself but rather some other plugin or functionality.
For reference, here is our requirements to use WP-Lister for Amazon:
Requirements
Professional Seller account with Amazon (see FAQ)
WooCommerce 3.0 or better
WordPress 4.2 or better
PHP 7.4 or better with cURL support
decent webspace hosted on a linux server
single language site – multilingual sites are not supported yet and neither are multisite networks!
no more than approx. 10,000 products – depending on your server
Kind regards,
John