After a long search I found the cause of my slow website. http://www.produits-gastronomiques.fr
I had uploaded the homepage in php and that translated the server inertia up to 17 seconds to the first pixel.
The other pages are in php because Rapidcart pro is written in php. Who knows what I can do about it?
Are there more Weavers who know this problem?
It would be great, it cost a lot of time to bring in all the products.