jphurley at jps.net
Fri Feb 22 09:25:01 EST 2002
Jim Hurley wrote:
> > > There appears to be no remedy in the offing to the speed problem.
Scott Rainey wrote:
>Actually the current release is pretty close to HC in performance,
>the primary remaining difference being due to running in color vs
>black and white (anywhere from 8 to 32 times as much data to move
>around, you know).
I concede the difficulties in speedily running color vs. black and
white, and the improvement in the current release is much
appreciated. However there remains a considerable gap between MC/RR
and HC. For example, the following script draws concentric boxes of
ever decreasing size.
put 100 into a
put 300 into b
put 2 into da
choose the line tool
put the ticks into startTime
repeat 50 --draw boxes of ever decreasing size
drag from a,a to b,a
drag from b,a to b,b
drag from b,b to a,b
drag from a,b to a,a
add da to a
subtract da from b
put the ticks - startTime into field 1
choose the browse tool
repeat until the number of images = 0
delete image 1
This script takes 265 ticks on average in RR and 30 ticks in HC on
cards of identical size. (I realize that this can be done more
efficiently with the rectangle tool and that a graphic would be
faster than an image. My purpose was to measure the drag speed. )
The discrepancy would be less in Windows.
There is no limit to the greedy demands which we, the users, put on
Scott and the development team. In my case, to properly implement
Turtle Graphics, I hunger for a speedy monochromatic drawing mode.
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