[comp.windows.x] why is ico slower

rws@EXPO.LCS.MIT.EDU (Bob Scheifler) (01/13/90)

    The new version of ico in double buffer mode draws the entire
    window each time the icosahedron moves, rather than just a
    square region around the icosahedron as the old version did.

It doesn't "draw the entire window" in a strict sense, it uses
the multi-buffering extension if it exists.  The sample implementation
of this extension uses pixmaps, and copies the entire buffer on-screen.

    Does anyone know why it was changed?

To provide an example of using the multi-buffering extension.
It is, after all, just a demo.