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

To: slug@WARBUCKS.AI.SRI.COM
Subject: are dynamic windows really 60X slower than old windows?!
From: David Cogen <cogen@XN.LL.MIT.EDU>
Date: Tue, 28 Feb 89 15:45:45 EST
Posted-date: Tue, 28 Feb 89 16:45:45 EDT

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?

Follow-Ups:
- are dynamic windows really 60X slower than old windows?!
  - From: "David L. Andre" <DLA%jasper.scrc.symbolics.com@RELAY.CS.NET>
- are dynamic windows really 60X slower than old windows?!
  - From: Mark Rosenstein <rosenstein@MCC.COM>
- are dynamic windows really 60X slower than old windows?!
  - From: Barry Margolin <barmar@THINK.COM>

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