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> wrote: > 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 > >
