[Cbc] Cbc speedup over the last two years?

[acw at ascent.com]

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.



From:
Ted Ralphs <ted at Lehigh.EDU>
To:
acw at ascent.com
Cc:
"cbc at list.coin-or.org" <cbc at list.coin-or.org>
Date:
04/25/2012 10:18 PM
Subject:
Re: [Cbc] Cbc speedup over the last two years?



What specific version of Cbc were you using previously?

Ted

On Wed, Apr 25, 2012 at 2:38 PM, <acw at ascent.com> wrote:
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. 

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. 

Have other COIN/Cbc users and developers experienced such a marked 
improvement?  Should we be ecstatic ... or suspicious?
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-- 
Dr. Ted Ralphs
Associate Professor, Lehigh University
(610) 628-1280
ted 'at' lehigh 'dot' edu
coral.ie.lehigh.edu/~ted

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