To quote the great Sherlock Holmes "i consider a man's brain originally is like a little empty attic, and you have to stock it with such furniture as you chose. A fool takes in all the lumber of every sort he comes across, so that the knowledge that might be usefull to him becomes crowded out, or at best is jumbled up with alot of other things, so he has difficulty laying his hands upon it. Now the skillfull workman is careful what he takes into his brain-attic. He will have nothing but the toolswhich may help him in doing his work, but of these he has a large assortment, and all in perfect order. It is a mistake to think that the little room has elastic walls and can distend to any extent. Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. it is the highest importance, therefore, not tohave useless facts elbowing out the usefull ones."
My point being that this obsession of the modern jazz musician with memorize obscure tunes from the great songbook runs contrary to the common sense of basic musicianship. Get your chops in order a clear you brain of crap. if you show up as leader on a gig, show up with books for the band that include your arrangements and preferences. Real books are tools and have application like any other tool. If someone calls me on a gig it's because I can rip the ass off a bass and serve it to you on a platter but they know up front I am a reader and proud of it.