The ceddcf_cart_refresh_timeout filter allows you to set how quickly the page will refresh after one of the quantity fields has been changed to display the correct number of fields.

The default value is 1000 milliseconds, which is equal to 1 second. 

To use this filter, you would create a function that returns a different value.

add_filter( 'ceddcf_cart_refresh_timeout', 'my_cart_refresh_timeout' );
function my_cart_refresh_timeout(){
	// Increase the timeout to 2 1/2 seconds
	return 2500;