The waiting time when adding products to the cart is very long. When I set up the demo site, it was added to the cart in a short time after clicking the add to cart button, but now the adding to cart time is very long.
After clicking the add to cart button, it sometimes takes 10 seconds to add to the cart.
What is the reason for this problem and how can it be solved?
Please deactivate all the third party plugins and activate only theme-required plugins on the site and then check the issue. I am sure your issue will be solved. Then activate the third party plugins one by one and check which plugin is creating the issue for you.
Otherwise, if the issue still exists, then keep the third party plugins deactivated and let me know I will check and give you a possible solution.