In my Magento 2 website adding to cart takes about 10 sec. Caching is OK. Redis is configured. Merging/minimizing for CSS/JS is enabled. I'm noticed that after first adding an item to the cart, adding to cart of this item takes a few seconds (Looks like caching), but after 5 minutes it's taking too much time again. Maybe there is a way to reduce time or cache "add to cart" for a long time? Great thanks and sorry for my English.