Thank you for answer!
No, no. I likely not correctly said.
When the plugin is enabled and all the attributes for the filter added in the sidebar.
I go to a category page (in this category are many subcategories), there is displayed all products from all subcategories. But of course everything is paged in. The page displays only 5-10 products. The filter fields also present on the page. But no the filter is not already selected. But opening such a page takes about 30 seconds and provides approximately 9,000 queries to MySQL.
