4Sight, X or NeWS?
Michael Toy -- The S.G.I. XMAN
mtoy at xman.SGI.COM
Mon Oct 24 17:15:44 AEST 1988
In article <128 at mlogic.UUCP>, marcel at mlogic.UUCP (Marcel Samek) writes:
> In article <20894 at sgi.SGI.COM> miq at chromavac.SGI.COM (Miq Millman) writes:
>
> >graphics hardware is incredibly fast, so performace is not hurt. On the 4D
> >series, pixel performance is about 8 million pixels per second.
>
> In the context of the discussion, which was about pixel based operations,
> this statement is utter nonsense. ...
>
> ... application programs can achieve pixel performances of
> significantly less than 100,000 pixels per second (roughly 2 orders of
> magnitude less) when painting pixel data.
>
> If you wish to read pixels from the frame buffer, the performance is
> significantly slower than if you wish to write pixels.
>
> It is disappointing to see Silicon Graphics employees post such deceptive
> garbage to the net.
I believe the published speed for copying pixels to the screen from user memory
on the GTX series machines IS 8 million pixels per second. So the only
deception in the first posting is the phrase "on the 4D series". It should have
been "on the multi-processor 4D series".
--
From the mixed up files of Mr. Michael C. Toy
Internet: mtoy at SGI.COM UUCP: {ames,ucbvax,decwrl,sun,parcvax}!mtoy
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