17.01

• Minor speed optimization for LZMA2 (xz and 7z) multi-threading compression.
  7-Zip now uses additional memory buffers for multi-block LZMA2 compression.
  CPU utilization was slightly improved.
• 7-zip now creates multi-block xz archives by default. Block size can be
  specified with -ms[Size]{m|g} switch.
• xz decoder now can unpack random block from multi-block xz archives.
  7-Zip File Manager now can open nested multi-block xz archives
  (for example, image.iso.xz) without full unpacking of xz archive.
• 7-Zip now can create zip archives from stdin to stdout.
• 7-Zip command line: @ListFile now doesn't work after -- switch.
  Use -i@listfile before -- switch instead.
• The BUGs were fixed:
  7-Zip could add unrequired alternate file streams to WIM archives,
  for commands that contain filename wildcards and -sns switch.
  7-Zip 17.00 beta crashed for commands that write anti-item to 7z archive.
  7-Zip 17.00 beta ignored "Use large memory pages" option.

17.00

• ZIP unpacking code was improved.
• 7-Zip now reserves file space before writing to file (for extraction from archive).
  It can reduce file fragmentation.
• Some bugs were fixed. 7-Zip could crash in some cases.
• Internal changes in code.

16.04

• The bug was fixed: 7-Zip 16.03 exe installer under Vista didn't create
  links in Start / Programs menu.
• Some bugs were fixed in RAR code.

16.03

• Installer and SFX modules now use some protection against DLL preloading attack.
• Some bugs were fixed in 7z, NSIS, SquashFS, RAR5 and another code.

16.02

• 7-Zip now can extract multivolume ZIP archives (z01, z02, ... , zip).
• Some bugs were fixed.

15.14

• 7-Zip File Manager:
  • The code for "Open file from archive" operation was improved.
  • The code for "Tools/Options" window was improved.
  • The BUG was fixed: there was incorrect mouse cursor capture for
    drag-and-drop operations from open archive to Explorer window.
• Some bugs were fixed.
• New localization: Yoruba.

15.12

• The release version.

15.11

• Some bugs were fixed.

15.10

• The BUG in 9.21 - 15.09 was fixed:
  7-Zip could ignore some parameters, specified for archive creation operation
  for gzip and bzip2 formats in "Add to Archive" window and in command line
  version (-m switch).
• Some bugs were fixed.