Subject:
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Re: Speed of RCX interpreting bytecodes: slow
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Mon, 3 Jan 2000 09:49:45 GMT
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Viewed:
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3708 times
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In lugnet.robotics.rcx, Ben Jackson writes:
> In lugnet.robotics.rcx, Roger Hamlett writes:
> > In lugnet.robotics.rcx, Ben Jackson writes:
> > > While working on the barcode scanner I decided to see just how fast the RCX
> >
> > It is important to realise, that the RCX, does not perhaps do the
> > interpretation in the way you think. In each 'loop', it executes one
> > instruction from each of the possible threads,
>
> Are you sure you mean each of the POSSIBLE threads? I did test to see whether
> it was slower to count to 1000 with another task running, and it was. Not • half
> as fast, only about 30% slower.
Yes, it seems to switch between two 'modes', one being effectively single
tasking, and the other multi-tasking. This gives the change you are seeing.
The 'loop' time, can be measured very easily with a scope, by setting a motor
output to the lowest forward speed, and measuring the pulse width generated.
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