Quote Originally Posted by retched View Post
Possibly because it's doing a full pull of the rates on each step. If you head back to shipping confirm and change the method, it does a full processing and pull of the rates. If you go back to change your payment method, it still does another full pull or all the rates with another call to the USPS server.

I suppose I can try to make a cache of sorts but right now it can't be helped.

I have also found a similar slow down.
Thanks for your reply. If I'm right, the early version of OPC also has this type of issue. So every time when I changed the selection, it will get a new quote, which will slow down the page. However, the newer/current OPC has solved this issue, at least there is almost no delay for UPS and fedex now.

Hopefully it will give you some ideas. Anyway, the old USPS plug-in still works for now.