On 01:58:33 PM Friday, June 10, 2011 Alexander Kurtakov wrote:
> On 01:01:39 PM Friday, June 10, 2011 Stanislav Ochotnicky wrote:
> > This is just an update on progress on migrating from maven2 to maven
> > package.
> > I just committed changes to maven package that will do a few things:
> > * direct processing of fragment files generated by %add*_maven_depmap
> > macros
> > * being able to process fragments in /usr/share/maven-fragments
> > * being able to resolve pom files in /usr/share/maven-poms
> > This will mean several things once the whole puzzle is created:
> > * No need for %update_maven_depmap macro in %post and %postun
> > * With it - no need for Require(post): jpackage-utils
> > * No more rpmlint warnings about non-conf file in /etc
> > * Sane place for pom files :-)
> > * Simpler packaging (IMO)
> > * Later on simpler patches to maven once we remove compat code.
> > For now we are backward compatible, so maven still reads from
> > /etc/maven/fragments and old _mavenpomdir.
> > Obviously there is certain performance penalty for processing few
> > hundred small files instead of one big file. However this performance
> > hit is rather small and only affects mvn-local and mvn-rpmbuild
> > so it won't affect users.
> > Worst case scenario, I'd rather move regenerating of depmaps into
> > maven shell script (comparing last change of depmap.xml with last
> > modification of fragments and all that...).
> > Right now no packaging modifications are necessary, since we don't
> > want to break maven2 just yet :-)
> > Next up: jpackage-utils and generation of maven2-depmap.xml even from
> > /usr/share/maven-fragments (for maven2 compat).
> > See https://fedoraproject.org/wiki/Migration_from_maven2
> > details and plan.
> Everything that simplifies packaging and doesn't degrade performance is an
> absolute win :).
> I'm already impressed with the speed improvements with our packaged version
> of maven 3.x (it's few times! faster not few percents) so few percents
> performance hit won't be noticed from people moving from maven2 to maven
Just to put some details. All executions are on my laptop 3rd attempt so all
the caches are hot :)
qdox package build with maven2:
qdox package build with maven3:
Isn't it impressive? :) Let's say ~3 times faster for.
Nice, I didn't expect such massive improvements there. :-) Do you
happen to know what the bottleneck was in maven2? Where was it
spending all of its time?