[Coin-discuss] PPC vs. x86

[Martin Mundschenk]

Hi!

I just compiled Cbc on an Intel Xeon running Debian Linux  as well as  
on an Apple PPC G5 running OSX:

Coin Cbc and Clp Solver version 1.01.00, build Jul  3 2006

The Intel runs at 3 GHz and the PPC at 2 GHz. I compared the  
performance of both machines on the problem nw04 from the miplib  
(http://miplib.zib.de/)

The PPC comes to this result:

Result - Finished objective 16862 after 0 nodes and 861 iterations -  
took 102.11 seconds

and the Intel to this one:

Result - Finished objective 16862 after 484 nodes and 4600 iterations  
- took 73.22 seconds

Why does the identical solver use different numbers of nodes and  
iterations on the identical problem but on different architectures?

Regards,
Martin
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