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Fast Graphics on 3653

The expected speed for a 36xx class machine drawing lines is just about
the same as a Mac II (68020 variety) using QuickDraw.  This is by no
means high-performance graphics (in either case).

If you are using the graphics:draw-line interface and want performance
at the expense of generality, you should note the following:

- try to avoid any keyword arguments other than :stream.  This will
invoke a compiler optimizer to a fast entry-point.

- leave the transform matrix alone (including using

- draw thin lines in :thickness 0, not :thickness 1.