I tested the match finder changes on arm64 (aws graviton) and results are
quite positive.

On Thu, May 19, 2022 at 3:41 PM Lasse Collin <lasse.col...@tukaani.org>

> On 2022-05-19 Dennis Ens wrote:
> > Is XZ for Java still maintained?
> Yes, by some definition at least, like if someone reports a bug it will
> get fixed. Development of new features definitely isn't very active. :-(
> > I asked a question here a week ago and have not heard back.
> I saw. I have lots of unanswered emails at the moment and obviously
> that isn't a good thing. After the latest XZ for Java release I've
> tried focus on XZ Utils (and ignored XZ for Java), although obviously
> that hasn't worked so well either even if some progress has happened
> with XZ Utils.
> > When I view the git log I can see it has not updated in over a year.
> > I am looking for things like multithreaded encoding / decoding and a
> > few updates that Brett Okken had submited (but are still waiting for
> > merge). Should I add these things to only my local version, or is
> > there a plan for these things in the future?
> Brett Okken's patches I haven't reviewed so I cannot give definite
> answers about if you should include them in your local version, sorry.
> The match finder optimizations are more advanced as they are somewhat
> arch-specific so it could be good to have broader testing how much they
> help on different systems (not just x86-64 but 32-bit x86, ARM64, ...)
> and if they behave well on Android too. The benefits have to be clear
> enough (and cause no problems) to make the extra code worth it.
> The Delta coder patch is small and relative improvement is big, so that
> likely should get included. The Delta filter is used rarely though and
> even a slow version isn't *that* slow in the big picture (there will
> also be LZMA2 and CRC32/CRC64).
> Threading would be nice in the Java version. Threaded decompression only
> recently got committed to XZ Utils repository.
> Jia Tan has helped me off-list with XZ Utils and he might have a bigger
> role in the future at least with XZ Utils. It's clear that my resources
> are too limited (thus the many emails waiting for replies) so something
> has to change in the long term.
> --
> Lasse Collin

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