Hi Ludovic, > http://hubble.gforge.inria.fr/parallel-builds.html > http://hubble.gforge.inria.fr/parallel-build-details.html
these results are very interesting -- thank you for sharing that data. > In short, package build scale very poorly, and more than half of the > packages didn’t scale beyond 2. The majority of open source software is built with Automake, and Automake is not particularly good at utilizing several cores. The most significant problem is that the common setting SUBDIRS = foo bar causes these two directories to be built *sequentially*. Automake won't even try to build 'bar' unless 'foo' is complete. There are historical reasons for that behavior, of course, but it's a really bad choice as far as parallel building is concerned. A build system that is superior in that regard is Boost.Jam, and indeed your numbers show that the Boost libraries benefit a *lot* from having several cores available. Take care, Peter _______________________________________________ nix-dev mailing list [email protected] https://mail.cs.uu.nl/mailman/listinfo/nix-dev
