The class cache is also available since Java 8 in the OpenJ9 VM, which also has faster startup times in most cases (for me). Not sure if the scc is portable when using different Java language levels, though.
But you can give it a try: https://www.eclipse.org/openj9/docs/shrc/ Other than that, I use mvnd at work and we never had problems on any project. We consistently save time without the need of adding the -T parameter manually. Another big question is probably: is there enough community demand to merge it into core? Tbh, I expected more mails on this thread. On Mon, 29 Mar 2021, 20:49 Romain Manni-Bucau, <rmannibu...@gmail.com> wrote: > Le lun. 29 mars 2021 à 19:26, Markus KARG <mar...@headcrashing.eu> a > écrit : > > > Looking at the impressively reduced bootstrap times of modern JDKs with > > features like Automatic AppCDS, I wonder if in the year 2021 this still > > makes sense? In rather near future there will be native precompilation > > available in most JDKs, effectively reducing bootstrap time to few ms. So > > is it worth investing this time and complexity? In the past, yes, up to > JDK > > 8, it definitively was. But NOW? > > > > Yep it makes sense more than ever IMHO because nothing actually changed for > maven: > > 1. CDS impact on maven is more or less 0 since maven bootstrap everything > in subclassloaders of the app loader and it is the only one able to benefit > from it (+ it is not the main benefit of a daemon, it also bypasses > resolution and all other steps the JVM will never do since it must be maven > aware) > 2. Making it GraalVM - ignoring the effort required to do it, run it on CI > (in time) and maintain it - will not help much for the same daemon goal > reason > > So is it worth doing a daemon -> clearly, this is what mvnd proves > (leveraging a mvnd client in native mode when possible btw). > > > > > > -Markus > > > > > > -----Ursprüngliche Nachricht----- > > Von: Romain Manni-Bucau [mailto:rmannibu...@gmail.com] > > Gesendet: Montag, 29. März 2021 12:21 > > An: Maven Developers List > > Cc: Jason Dillon > > Betreff: Re: Why no mvn daemon? > > > > Up 4 years later ;) > > > > Now mvnd exists and proves it is very interesting to have such a feature, > > should it be something which can fit maven standard delivery? > > If overall yes we can start by asking mvnd if it can be contributed with > > main codebase and if not we can either decide to do our own (hope not ;)) > > or that maven does not care about caching/optimizations in its "core" and > > that it is only done in extensions (I know 3 "main" ones as of today). > > > > Wdyt? > > > > Romain Manni-Bucau > > @rmannibucau <https://twitter.com/rmannibucau> | Blog > > <https://rmannibucau.metawerx.net/> | Old Blog > > <http://rmannibucau.wordpress.com> | Github < > > https://github.com/rmannibucau> | > > LinkedIn <https://www.linkedin.com/in/rmannibucau> | Book > > < > > > https://www.packtpub.com/application-development/java-ee-8-high-performance > > > > > > > > > Le mer. 9 mars 2016 à 23:58, Jeff Jensen < > > jeffjen...@upstairstechnology.com> > > a écrit : > > > > > Thanks! It's running just fine. :-) It's very cool. Really nice > > > directory traversal and completion, colors, and commands/features I > don't > > > know yet! > > > > > > Very interesting timing diffs (for each casual test, I ran the command > > for > > > each multiple times to seed infra caches): > > > * on some asciidoc gen with "mvn generate-resources", it was about the > > > same duration as CLI but after running each about 10 times, mvnshell > > saved > > > about 20% consistently (possibly due to JIT? besides directory > traversal, > > > this was the first things I did). This was my key use case for > wanting a > > > "mvn server" - handling situations like this with repeated runs > > (asciidoc, > > > site, etc.). > > > > > > * on a simple "mvn clean", mvnshell was about 2x faster than CLI. > > > > > > * on a small module build, "mvn install" was about 20% faster over CLI > > > (after a mvn clean for each). > > > > > > I look forward to trying more things. > > > > > > Nice to have, thank you Jason! > > > > > > > > > On Wed, Mar 9, 2016 at 4:17 PM, Jason Dillon <jason.dil...@gmail.com> > > > wrote: > > > > > > > Jason, if you have a built version, do you mind adding it as a > download > > > to > > > > > > > > the release files? > > > > > > > > I can make a binary of this, though I do plan on fixing it up so that > > > > folks can build it in the near future. > > > > > > > > Build up here for the moment: > > > > > > > > > > > > > > https://www.dropbox.com/sh/yvt1g43r2pr2scj/AADqM__VhJaFf_x57OiUEZXva?dl=0 > > > > > > > > gshell:master should be buildable with just central now, dangling ref > > to > > > > older version of jline for classifer=tests which was unused and > > polluting > > > > the build dependencies. > > > > > > > > —jason > > > > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: dev-unsubscr...@maven.apache.org > > For additional commands, e-mail: dev-h...@maven.apache.org > > > > >
