Add to cart takes up to 9 seconds? :o

Hello

I’m struggling with an issue. The website speed in general is quite fast in loading
(for now with cache and redis disabled) until I can find the source of this issue.

When i add a product to the cart. Ajax kicks in and spins… up to 8 – 9 seconds. And if i’m in bad luck when the spinning is done sometimes it takes again 4 seconds when the cart is updated.

Server is a dedicated
Intel Xeon E-2236 – 32 gb ram and NVMe drives
Php 7.74.0

I increased some settings too, but that didn’t help.
PHP max input variables 10000
PHP time limit 300
PHP memory limit 512M
Max input time 300

I hope someone knows what the problem could be.

With the theme only, it spins for 2 seconds and updates the cart. That’s okay. I’m not sure it goes much faster on a woocommerce platform, or that it can update instantly with ajax.

The funny thing is you can favorite the products, and that’s instant on the click!

The page I need help with: [log in to see the link]