Hello! Thanks for taking the time to look into this. I'd definitely be willing to believe that this is strange going on with these builds, but I'll keep working on getting an actual reproducer set up.
I didn't have any luck with setting the http protocol back to 2. I *did* wind up running Maven with JFR (via `MAVEN_OPTS="$MAVEN_OPTS -XX:StartFlightRecording=filename=recording.jfr" mvn dependency:tree`) to see if I could collect some timing data, in case you think that'd be worth looking into. recording-rc1.jfr <https://drive.google.com/open?id=1fyzhR5Avgrg15sFpv5Pt3z5fiuubTLpx> recording-beta5.jfr <https://drive.google.com/open?id=1VtoKbI8WNTC_JDZgssG-AGAv1jUeKQg4> Thanks for your help! Peter Teixeira On Sat, Dec 21, 2024 at 7:42 AM Tamás Cservenák <ta...@cservenak.net> wrote: > Found a slightly bigger tree: > https://gist.github.com/cstamas/c255de93292ecbf1f6f0597ac58624a8 > <https://gist.github.com/cstamas/c255de93292ecbf1f6f0597ac58624a8> > > Still no noticeable diff, especially not in order of magnitude like > seconds vs minutes... > > Something else is going on... > > Thanks > T > > On Sat, Dec 21, 2024 at 1:34 PM Tamás Cservenák <ta...@cservenak.net> > wrote: > > > > Still shooting in the dark... > > but just to rule out any mischief in any plugin, > > I used my own code, and ran it with 3.9.9 and 4.0.0-rc-1 on a project > > I could find, that has fairly big(ger) tree: > > > > https://gist.github.com/cstamas/c2751bd8c18eb553f3c38d839c60fc67 > <https://gist.github.com/cstamas/c2751bd8c18eb553f3c38d839c60fc67> > > > > As you see, both finished in almost exactly the same duration... > > So this is not a resolver collection for sure. > > > > Thanks > > T > > > > On Sat, Dec 21, 2024 at 1:24 PM Tamás Cservenák <ta...@cservenak.net> > wrote: > > > > > > Hi Peter, > > > > > > one obvious thing comes to my mind: > > > Maven 4.0.0-rc-1 uses Resolver 2.0.4, not 2.0.3. > > > > > > And one big change in Resolver 2.0.4 was backing from HTTP/2 protocol > > > to HTTP/1.1 transport for default JDK > > > (that, in the scenario of getting a lot of small data like Maven > > > metadata are, does matter). > > > > > > Can you rerun your commands with added following parameter: > > > -Daether.transport.jdk.httpVersion=HTTP_2 > > > > > > This will re-enable HTTP/2 for JDK transport. > > > > > > Thanks > > > T > > > > > > On Sat, Dec 21, 2024 at 3:06 AM Peter Teixeira > > > <pteixe...@hubspot.com.invalid> wrote: > > > > > > > > Hello, > > > > > > > > First, I sincerely apologize that I don't have a reproducer for > this, but I > > > > did want to say something before the full release of Maven 4. > > > > > > > > It seems like for certain dependency tree setups, dependency > resolution got > > > > much much slower between Maven 4-beta-5 and Maven 4-rc-1. I > specifically > > > > think this was introduced in maven-resolver 2.0.3, and building Maven > > > > 4-rc-1 patching back to maven-resolver 2.0.2 restores the behavior I > was > > > > seeing before. > > > > > > > > I have a gist > > > > < > https://gist.github.com/PtrTeixeira/b7ad68d2e58c6a2277206b2b6328dc16 > <https://gist.github.com/PtrTeixeira/b7ad68d2e58c6a2277206b2b6328dc16>> > of > > > > the behavior that I'm seeing; for Maven 3 & Maven 4-beta-5, running > `mvn > > > > dependency:tree` on this module takes seconds. For Maven 4-rc-1 and > Maven > > > > 4-rc-2, it takes over a minute. > > > > > > > > For some background context, at work almost all libraries are used at > > > > `1.0-SNAPSHOT` versions and are managed in a single parent-pom. I'm > seeing > > > > this behavior across many repositories at work, so it's not something > > > > specific to this module. While trying to reproduce this, I did > establish > > > > that it doesn't seem to be specifically a result of the depth of the > > > > dependency tree or the total number of dependencies in the > dependency tree. > > > > > > > > Please let me know if there's any other information that I can give > you to > > > > help identify this or track this down; I know this isn't a lot of > > > > information to go on, but this is enough of a performance change > that I > > > > wanted to say something before Maven 4 gets fully released. > > > > > > > > Thanks, > > > > Peter Teixeira > > > > > > > > -- > > > > We're committed to your privacy. HubSpot utilizes both public > information > > > > and/or the information you provide to us to contact you about our > relevant > > > > content, products, and services. You may unsubscribe > > > > <mailto:opt-...@hubspot.com?subject=unsubscribe&body=unsubscribe> > from > > > > these communications at any time. For more information, check out our > > > > Privacy Policy <https://legal.hubspot.com/privacy-policy>. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org > For additional commands, e-mail: users-h...@maven.apache.org > -- We're committed to your privacy. HubSpot utilizes both public information and/or the information you provide to us to contact you about our relevant content, products, and services. You may unsubscribe <mailto:opt-...@hubspot.com?subject=unsubscribe&body=unsubscribe> from these communications at any time. For more information, check out our Privacy Policy <https://legal.hubspot.com/privacy-policy>.
