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Problem with gawk-3.1.5-3

I have a gawk script that I've been using unchanged for at least 9
months that seems to have broken with the transition from gawk-3.1.5-2
to gawk-3.1.5-3.

Gawk seemed to hang, though it might be merely very slow.  I let it run
for hours before killing it.  gawk-3.1.5-2 took 20-30 seconds to run.

This is the script, if that makes a difference.  It is in the middle of
a pipe, receiving input from sort and giving output to another instance
of sort.  Everything should have unix-style line-endings.  The pipe is
running under ash.  The script actually used a tab character instead of
the "\t" escape sequence.  I changed it to "\t" below in the hope that
that might be easier to read in this email.

  gawk '  BEGIN   { FS = OFS = "\t" }
                  Key = $2 "\t" $3 "\t" $4
                  InfoNew[Key] = $5
                  DateNew[Key] = $1
                  if (InfoOld[Key] == "") {
                          InfoOld[Key] = InfoNew[Key]
                          DateOld[Key] = DateNew[Key] }
                  if (InfoNew[Key] != InfoOld[Key]) {
                          print DateOld[Key], Key, InfoOld[Key]
                          InfoOld[Key] = InfoNew[Key]
                          DateOld[Key] = DateNew[Key] }
          END     {
                  for (Key in InfoOld) {
                          print DateOld[Key], Key, InfoOld[Key] }

Do I need to send anything else?

Perhaps related:  gawk-3.1.5-3.tar.bz2 seems a lot bigger than
gawk-3.1.5-2.tar.bz2.  Might that be something that needs attention?

-rwxr-x---+ 1  630852 2005-11-17 11:51:36 gawk-3.1.5-2.tar.bz2
-rwxr-x---+ 1 1011999 2006-03-13 08:05:25 gawk-3.1.5-3.tar.bz2

- Barry

Barry U. Buchbinder, Ph.D.
Technology Development Associate
Office of Technology Development (OTD)
National Institute of Allergy and Infectious Diseases (NIAID)
National Institutes of Health (NIH)
U.S. Department of Health and Human Services (HHS)

6610 Rockledge Drive, Room 4071, MSC 6606
Bethesda, MD  20892-6606  (Zip Code for Courier:  20817)
301-496-2644 / Fax: 402-7123 / Direct: 594-1696 / Office: Room 4041

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