question for you sound guys

As a producer in an edit session I have a question. At the end of a session and the mix is locked how long should it take to "bounce" the tracks?

For example, say I have a 23 minute show. I need a full mixed track, and also a split track version (say 1 track VO, 1 track sfx, 1 track music) Would it be 23 minutes for each one of these, so 4 x 23 minutes, or could it be faster? I just wonder because I feel like I am getting banged for extra time while this process happens.

They are working on Pro Tools by the way.

Thanks for an enlightenment you can give me.