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Subject: Re: printing pv slow down question

Author: Uri Blass

Date: 09:13:59 08/15/04

Go up one level in this thread

On August 15, 2004 at 12:01:56, Andrew Platt wrote:

>Do not underestimate the cost of writing to Windows terminals! Particularly if
>the output is unbuffered it can be quite intense. Try this: Open a file as a
>test and send the output to there (default buffering of fopen is fine). See if
>you see the same slowdown.
>
>Andy.

It cannot be the cost of writing because the difference between times when there
is no additional writing is also significantly bigger.

I do not understand what is unbuffered output.

I use fflush(stdout) after every printf but I know that I need to use
fflush(stdout) after lines that I print (otherwise the program may work in text
mode but not under winboard)

Uri

• Re: printing pv slow down question Mathieu Pagé 12:16:17 08/15/04
  • Re: printing pv slow down question Uri Blass 12:24:36 08/15/04
    • Re: printing pv slow down question Mathieu Pagé 15:46:04 08/15/04
      • Re: printing pv slow down question Uri Blass 06:30:58 08/16/04
        • Re: printing pv slow down question Mathieu Pagé 16:08:24 08/16/04
• Re: printing pv slow down question Alessandro Scotti 09:51:24 08/15/04

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