That is very strange. It usually takes just a couple of seconds. Is your file very large?
Anyway, that is the most efficient way of doing it in Acrobat. A more powerful tool would have to be a stand-alone application, running independently of Acrobat. I've developed such tools in the past, so if you're interested in hiring a professional to create it for you, feel free to contact me privately by clicking my user-name and then on "Send a Message".
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