On one of our domains, our customer's website loads very slow the first time. After that, it loads at a normal speed for the remainder of the time the user is logged in. All other users also have slow loads the first time, and when they log out and back in, slow loads the first time.
It looks like an issue with DNS resolution on the first load, and in all the other domains it works just fine. Is there a good way I can speed up this resolution without manually setting the DNS<>IP in the event the site changes location?