61 lines
1.8 KiB
Plaintext
61 lines
1.8 KiB
Plaintext
|
|
||
|
|
XZ Utils To-Do List
|
||
|
|
===================
|
||
|
|
|
||
|
|
Known bugs
|
||
|
|
----------
|
||
|
|
|
||
|
|
The test suite is too incomplete.
|
||
|
|
|
||
|
|
If the memory usage limit is less than about 13 MiB, xz is unable to
|
||
|
|
automatically scale down the compression settings enough even though
|
||
|
|
it would be possible by switching from BT2/BT3/BT4 match finder to
|
||
|
|
HC3/HC4.
|
||
|
|
|
||
|
|
The code to detect number of CPU cores doesn't count hyperthreading
|
||
|
|
as multiple cores. In context of xz, it probably should.
|
||
|
|
Hyperthreading is good at least with p7zip.
|
||
|
|
|
||
|
|
XZ Utils compress some files significantly worse than LZMA Utils.
|
||
|
|
This is due to faster compression presets used by XZ Utils, and
|
||
|
|
can be worked around by using "xz --extreme". However, the presets
|
||
|
|
need some tweaking and maybe this issue can be minimized without
|
||
|
|
making the typical case too much slower.
|
||
|
|
|
||
|
|
xz doesn't quote unprintable characters when it displays file names
|
||
|
|
given on the command line.
|
||
|
|
|
||
|
|
tuklib_exit() doesn't block signals => EINTR is possible.
|
||
|
|
|
||
|
|
|
||
|
|
Missing features
|
||
|
|
----------------
|
||
|
|
|
||
|
|
xz doesn't support copying extended attributes, access control
|
||
|
|
lists etc. from source to target file.
|
||
|
|
|
||
|
|
Multithreaded compression
|
||
|
|
|
||
|
|
Multithreaded decompression
|
||
|
|
|
||
|
|
Buffer-to-buffer coding could use less RAM (especially when
|
||
|
|
decompressing LZMA1 or LZMA2).
|
||
|
|
|
||
|
|
I/O library is not implemented. It will possibly be named libzzf.
|
||
|
|
|
||
|
|
lzma_strerror() to convert lzma_ret to human readable form?
|
||
|
|
This is tricky, because the same error codes are used with
|
||
|
|
slightly different meanings.
|
||
|
|
|
||
|
|
|
||
|
|
Documentation
|
||
|
|
-------------
|
||
|
|
|
||
|
|
Some tutorial is needed for liblzma. I have planned to write some
|
||
|
|
extremely well commented example programs, which would work as
|
||
|
|
a tutorial. I suppose the Doxygen tags are quite OK as a quick
|
||
|
|
reference once one is familiar with the liblzma API.
|
||
|
|
|
||
|
|
Document the LZMA1 and LZMA2 algorithms.
|
||
|
|
|