> Are there any open issues? If not, what needs to be done before the
> final release can happen?

The 5.4.0 release that will contain the multi threaded decoder is
planned for December. The list of open issues related to 5..4.0 in
general that I am tracking are:

- Final tweaks to multi threaded decoder (error handling may need
improvements since the worker threads stay running in some cases when
they should not).
- New ARM64 filter needs to be properly coordinated to other xz
implementations and documented.
- Converting tests to the new tuktest framework. Most of the tests
have been written, but they still need to be reviewed.
- liblzma and xz functionality to convert a string into a filter
chain. A draft of this is on the mailing list already, but the syntax
needs finalizing and the code was not polished.
- A patch for .lz support needs review.
- A patch for crc64 optimizations needs review.
- Misc. minor bug fixes.

This is everything currently planned. Most things are done and just
needs review and minor improvements. Don't worry, multi threaded
decompression will be coming to xz in a stable release very soon!

Jia Tan

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