Optimize your site speed. Yii framework.

Need optimization of site speed. Particularly interested in category page.

Normal informational pages load fairly quickly, but the category pages of products loaded for a long time.

The link to the site timbo.ua.

The site is written in Yii frangence.

Seen that the categories with a small number of CMV products are loaded much faster, says the system administrator, probably improperly formed queries to the database.