16:52:45|3b|shinmera: off-topic for #sbcl, but have you seen sb-cga's stuff for avoiding consing of intermediate results?
16:55:33|3b|ACTION feels like writing big nested matrix math forms isn't really all that common though, at least for the things i'd expect to take up a lot of time... i'm more likely to worry about things like "here's a big tree of matrices, multiply each by its parent"