Herve; I added the dependency to the parent pom to the docs. Jason: In the current project I'm working with, I get the following timings:
mvn -o -T 4 clean install : 53 seconds mvn -o clean install : 50 seconds mvn -DskipTests -o -T 4 clean install : 14.1 seconds mvn -DskipTests -o clean install : 16.624 seconds This is quite a small project with a very limited fan-out hence limited effect. I exclusively run in offline mode when benchmarking (which I know is "cheating"). I recommend running with "sufficient" threads, use -T 10. Also, the plugin loading is heavily synchronized, which can have a very detrimental effect on for instance level 4 in your graph, if all the 5 nodes on that level are first-time users of the same plugin and this plugin is slow in construction. (This is a lot more common than one might think, since those 5 modules end up at level 4 for the same reason). This is actually why the concurrent preemptive plugin loading that I started prototyping has "significant" potential. It will easily make *every* maven build a second or two faster, mitigate the effects of artifact resolution and avoid global synchronization points on plugin loading. Stuart kindly found a few problems for me that I have yet to fix, which I might consider doing over a glass of something from northern Italy tonight - I'm anxious to find out to what extent it breaks things ;) Kristian 2013/9/19 Jason van Zyl <[email protected]>: > Each circle is a project in a multi-project build (I think we need to clean > up our terminology, I stopped saying multi-module built so I don't have to > explain the difference between a module and project). > > Kristian is correct it's the depth from the root project. Everything on level > 1 can be built simultaneously without any side-effects. > > On Sep 19, 2013, at 10:27 AM, Hervé BOUTEMY <[email protected]> wrote: > >> I suppose each circle is a module >> but I don't understand what the levels are, and how modules are dispatched >> into levels >> >> Regards, >> >> Hervé >> >> Le jeudi 19 septembre 2013 18:36:49 Kristian Rosenvold a écrit : >>> Jason sent me some questions about the parallel build that included a >>> real nice figure. Since I'm a sucker for nice figures (especially >>> those that others make!), I quickly updated the wiki page with this, >>> and added some docs to describe his figure. >>> >>> https://cwiki.apache.org/confluence/display/MAVEN/Parallel+builds+in+Maven+3 >>> >>> >>> Kristian >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: [email protected] >>> For additional commands, e-mail: [email protected] >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> > > Thanks, > > Jason > > ---------------------------------------------------------- > Jason van Zyl > Founder, Apache Maven > http://twitter.com/jvanzyl > --------------------------------------------------------- > > > > > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
