XZ 5.2 Adds New Multi-Threaded Options

[ryszardzonk]

I wanted to take a look at some more detailed info of how to use that decompression method. Looked up README

http://git.tukaani.org/?p=xz.git;a=b...f0a173;hb=HEAD and found this:

"XZ Utils doesn't support multithreaded compression or decompression yet. It has been planned though and taken into account when designing the .xz file format."

[shmerl]

They probably just forgot to update README.

[guido12]

Has anyone got mult-threaded decompression to work? I downloaded and compiled the 5.2.0 stable release of XZ Utils. Multi-threaded compression works but I can't seem to get multi-threaded decompression to work.

Interestingly, a file compressed with multiple threads using xz can be decompressed with multiple threads using Pixz (https://github.com/vasi/pixz).

[2bluesc]

Has anyone got mult-threaded decompression to work? I downloaded and compiled the 5.2.0 stable release of XZ Utils. Multi-threaded compression works but I can't seem to get multi-threaded decompression to work.

Interestingly, a file compressed with multiple threads using xz can be decompressed with multiple threads using Pixz (https://github.com/vasi/pixz).

Just started experimenting and observed the same things. What gives?

Even tried pixz for compression and xz -d --threads=0 for decompression.

[mmmbop]

Documented that threaded decompression hasn't been implemented yet. A 5.2.0 NEWS entry describing multi-threading support had incorrectly said "decompression" when it should have said "compression".

http://git.tukaani.org/?p=xz.git;a=b...f=NEWS;hb=HEAD

[shmerl]

That's quite annoying... When do they plan to implement multithreaded decompression?