[hurstdog]

It all depends. I don't know how Boomerang is implemented, but it's possible that with an account your size it's hitting some degenerate condition.

One of our support folks should be emailing you and they'll help debug where the slowness lies, on our side or through some other interaction. If it's a bug, we'll fix it up shortly.

[baydinalex]

A little late to the party here, but Boomerang doesn't do anything at all except for when you Boomerang something and when it's scheduled to be sent/returned. The rest of the time, it doesn't make any API calls.