[REQ] Add support for lrz / lrztar

[zenspider]

I've been testing lrz against some of my larger archives and even with default settings (eg not -9 etc) it's beating them out. Also it uses ALL the available CPU so it seems to do it at a very nice clip as well. Would you be open to adding this compression format?

[aonez]

Thanks @zenspider! It's already in the list #84. Did some tests yesterday with the stable version 0.631 and found no improvements over 7Z, that also uses LZMA. Only using zpaq -z got some better results but not consistent and the time spent was crazy. Can you show some of your results?

If I see fit for it would be easy to support it in Keka :)

[aonez]

Had some time and went ahead with this one. The progress bar is a little useless sometimes due to the steps used in LRZIP.

I'm using LZMA compression but ZPAQ on the slowest setting.

https://d.keka.io/test/Keka-LRZIP

[zenspider]

Awesome. Thank you... If it's the same algs as 7Z then maybe I should just switch over to that. I'm good either way as long as I get those compression ratios.

[aonez]

I'm adding it because ZPAQ, that sometimes has better ratio than LZMA! It is very, very slow but might be worth in some cases.

[akrabu]

Had some time and went ahead with this one. The progress bar is a little useless sometimes due to the steps used in LRZIP.

I'm using LZMA compression but ZPAQ on the slowest setting.

https://d.keka.io/test/Keka-LRZIP

So I tried using this version to extract an XZ archive containing an IMG file to test compression with, but after extraction the file just disappears haha. I tested it twice. It puts original in the trash, and the extracted file disappears. Just a heads up!

[aonez]

@akrabu can you reproduce this while in a Keka debug session? Late 1.2.0 builds use a new extraction step, maybe it's failing for you. Also use a fallback folder (Desktop by default), check it's not going there the extraction.

[akrabu]

@aonez Actually the file was on my desktop. And, if I try to extract the Keka-LRZIP.7z itself, with the version from within Keka-LRZIP.7z, it does the same thing.

I then gave the new Keka full disk access. Still doesn't work. :(

Here's the log file.

Here's what my File Access tab looks like: