are dynamic windows really 60X slower than old windows?!

["David L. Andre" <DLA%jasper.scrc.symbolics.com@RELAY.CS.NET>]

    Date: Tue, 28 Feb 89 16:45:45 EDT
    From: cogen@XN.LL.MIT.EDU (David Cogen)

    I measured the time to do draw 240 rectangles (with :DRAW-RECTANGLE) and 80
    strings (with :DRAW-STRING) to a DW:DYNAMIC-WINDOW. It took 20 seconds!

    Then I did the same thing to a TV:WINDOW. It took .35 seconds.

    Could dynamic windows really be that slow? Surely not possible. I must be doing
    something wrong. Is there a trick to bring graphics speed to a dynamic window to
    at least within a factor of 2 of a static window?

Maybe you did the dynamic-window test interpreted?  I get less than a factor of two.