On Wed, 27 Jan 2010, Yujie wrote: > In "dbg", the problem is always there.
I hadn't noticed before that you were running in debug mode. Bad performance is inherent to METHOD=dbg; we turn off optimization, we test every assertion, we sometimes even add extra "double-checking" libMesh code, GNU libstdc++ turns every std::vector index into a checked index... worst of all, the GNU libstdc++ debug mode checks on std::set actually have asymptotically greater cost than the operations they're checking! Performance with METHOD=dbg will always be lousy. The solution is, when you need performance, compile with METHOD=opt. --- Roy ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
