Hi Tom,
You are checking the wrong page in the video. That is the default results page, while the plugin is directed to the WooCommerce results page. If you try: https://www.wildguitars.co.il/?s=&post_type=product
..then the response time is going to be over 20 seconds – even if the plugin is disabled. The problem seems to be with the WooCommerce results page.
If you change the search to redirect to the default results page, the response time will be fine.