Does the number of products in the shop influence the time it takes to load the webshop?
The size of the assortment does not influence the time it takes to load the shop. When accessing the shop only the part of the assortment that is shown is loaded, not the complete assortment. Once a customer clicks a productline the data of the products in that line are loaded. If you put 150 products in one productline all product data of the products in that line will be loaded once a customer clicks that productline. It is better to spread products equally over productlines (to get a good balance).
