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Re: Wrong current speed

From: Daniel Stenberg <>
Date: Mon, 12 Nov 2001 08:23:17 +0100 (MET)

On Mon, 12 Nov 2001, [iso-8859-15] Andrés García wrote:

> I have noticed in version 7.9.1 that sometimes, specially with small
> files, the progress meter reports a current speed of -2048M.

Yes, I've seen it happen too. I just didn't track it as far and good as
you've did here!

> As far as I can see, the problem is in ' Curl_tvdiff ', sometimes the
> time difference is below a millisecond and the function returns '0' .


> The speed will be a bit off though, it may be better if the function
> returned a double.

Hehe, I just converted (for 7.9.1) the function from returning a double into
returning the number of milliseconds. I did that because I don't like having
to mess with doubles all over, since they're slow and not as accurate as the
number of milliseconds. Also, I wanted the amount of milliseconds in a number
of places.

Wouldn't you say a better fix would be to check the return code in the
progress meter function to see if it returns zero, and then use one instead?

Something like this:

--- progress.c 2001/10/31 14:45:47 1.34
+++ progress.c 2001/11/12 07:21:51
@@ -275,6 +275,8 @@
     /* Figure out the exact time for the time span */
     span_ms = Curl_tvdiff(now,
+ if(0 == span_ms)
+ span_ms=1; /* at least one millisecond MUST have passed */

     /* Calculate the average speed the last 'countindex' seconds */
     data->progress.current_speed =

    Daniel Stenberg -- curl groks URLs --
Received on 2001-11-12