<font size=2 face="sans-serif">It's from before CbcSolver politely announced
its build date with every solve. Circumstantial evidence indicates
a version from late 2008, so it's older than I thought when I wrote my
initial message.</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">Ted Ralphs <ted@Lehigh.EDU></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font>
<td><font size=1 face="sans-serif">acw@ascent.com</font>
<tr>
<td valign=top><font size=1 color=#5f5f5f face="sans-serif">Cc:</font>
<td><font size=1 face="sans-serif">"cbc@list.coin-or.org" <cbc@list.coin-or.org></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">04/25/2012 10:18 PM</font>
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<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font>
<td><font size=1 face="sans-serif">Re: [Cbc] Cbc speedup over the last
two years?</font></table>
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<hr noshade>
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<br>
<br><font size=3>What specific version of Cbc were you using previously?</font>
<br>
<br><font size=3>Ted<br>
</font>
<br><font size=3>On Wed, Apr 25, 2012 at 2:38 PM, <</font><a href=mailto:acw@ascent.com target=_blank><font size=3 color=blue><u>acw@ascent.com</u></font></a><font size=3>>
wrote:</font>
<br><font size=3 face="sans-serif">After procrastinating for months, we
finally got around to rebuilding our application on the most recent stable
version of the COIN/Cbc sources. Our last update was around two years
ago.</font><font size=3> <br>
</font><font size=3 face="sans-serif"><br>
We were very pleasantly surprised to find a dramatic speedup in solving
our typical problem mix. Problems that used to run out of time (with
a timeout set to 1800 CPU seconds) now complete in just a few seconds.</font><font size=3>
<br>
</font><font size=3 face="sans-serif"><br>
Have other COIN/Cbc users and developers experienced such a marked improvement?
Should we be ecstatic ... or suspicious?</font><font size=3><br>
_______________________________________________<br>
Cbc mailing list</font><font size=3 color=blue><u><br>
</u></font><a href="mailto:Cbc@list.coin-or.org"><font size=3 color=blue><u>Cbc@list.coin-or.org</u></font></a><font size=3 color=blue><u><br>
</u></font><a href="http://list.coin-or.org/mailman/listinfo/cbc" target=_blank><font size=3 color=blue><u>http://list.coin-or.org/mailman/listinfo/cbc</u></font></a><font size=3><br>
</font>
<br><font size=3><br>
</font>
<br>
<br><font size=3>-- <br>
Dr. Ted Ralphs<br>
Associate Professor, Lehigh University<br>
(610) 628-1280<br>
ted 'at' lehigh 'dot' edu</font><font size=3 color=blue><u><br>
</u></font><a href=http://coral.ie.lehigh.edu/~ted target=_blank><font size=3 color=blue><u>coral.ie.lehigh.edu/~ted</u></font></a><font size=3><br>
</font>
<br>