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MathGroup Archive 2007

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Re: Can't abort a loop with Print inside (V6)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg83157] Re: Can't abort a loop with Print inside (V6)
  • From: Bill Rowe <readnewsciv at sbcglobal.net>
  • Date: Tue, 13 Nov 2007 03:40:32 -0500 (EST)

On 11/12/07 at 5:09 AM, bhu at cvs.rochester.edu (Bo Hu) wrote:

>This is not about a loop running faster than one could stop it
>before it ends.  The simple loop runs for quite a few seconds on my
>Macbook Pro, because of the Print statement.  It appears to be
>improper synchronization between the kernel and the front end.  More
>like a misfeature if that's the intended behavior.

I did not mean to imply the loop would complete sooner than one
could stop it before it ends. Instead, I was trying to describe
the case where the time for the to see a key press is to small.

That is a sufficiently tight loop simply doesn't allow enough
time for the key press to be seen.

As far as I know, this has always been present. And I do not
believe this issue is strictly a Mathematica issue. Any program
that runs a sufficiently tight loop will see the same behavior.
I believe the only way Wolfram could prevent this behavior is to
intentionally place a maximum loop rate. That is intentionally
add a minimum delay into loops so that there is time to see user
key presses. And I think this would be more of a problem than
the current situation.

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