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HISTORY of the 7-Zip
--------------------
23.01 2023-06-20
-------------------------
- The page "Language" in 7-Zip's menu Tools/Options now shows information
about selected translation, including the number of translated lines.
- Some bugs were fixed.
23.00 2023-05-07
-------------------------
- 7-Zip now can use new ARM64 filter for compression to 7z and xz archives.
ARM64 filter can increase compression ratio for data containing executable
files compiled for ARM64 (AArch64) architecture.
Also 7-Zip now parses executable files (that have exe and dll filename extensions)
before compressing, and it selects appropriate filter for each parsed file:
- BCJ or BCJ2 filter for x86 executable files,
- ARM64 filter for ARM64 executable files.
Previous versions by default used x86 filter BCJ or BCJ2 for all exe/dll files.
- Default section size for BCJ2 filter was changed from 64 MiB to 240 MiB.
It can increase compression ratio for executable files larger than 64 MiB.
- UDF: support was improved.
- cpio: support for hard links.
- Some changes and optimizations in WIM creation code.
- When new 7-Zip creates multivolume archive, 7-Zip keeps in open state
only volumes that still can be changed. Previous versions kept all volumes
in open state until the end of the archive creation.
- 7-Zip for Linux and macOS now can reduce the number of simultaneously open files,
when 7-Zip opens, extracts or creates multivolume archive. It allows to avoid
the failures for cases with big number of volumes, bacause there is a limitation
for number of open files allowed for a single program in Linux and macOS.
- There are optimizations in code for 7-Zip's context menu in Explorer:
the speed of preparing of the menu showing was improved for cases when big number of
files were selected by external program for context menu that contains 7-Zip menu commands.
- There are changes in code for the drag-and-drop operations to and from 7-Zip File Manager.
And the drag-and-drop operation with right button of mouse now is supported for some cases.
- The bugs were fixed:
- ZIP archives: if multithreaded zip compression was performed with more than one
file to stdout stream (-so switch), 7-zip didn't write "data descriptor" for some files.
- ext4 archives: 7-Zip couldn't correctly extract symbolic link to directory from ext4 archives.
- HFS and APFS archives: 7-Zip incorrectly decoded uncompressed blocks (64 KiB) in compressed forks.
- Some another bugs were fixed.
22.01 2022-07-15
-------------------------
- UDF support was improved to UDF version 2.60.
- HFS and APFS support was improved.
22.00 2022-06-15
-------------------------
- 7-Zip now can extract APFS (Apple File System) images that can be used in DMG files.
- 7-Zip now can create TAR archives in POSIX (pax) tar format with the switches
-ttar -mm=pax or -ttar -mm=posix
- 7-Zip now can store additional file timestamps with high precision (1 ns in Linux)
in tar/pax archives with the following switches:
-ttar -mm=pax -mtp=3 -mtc -mta
- New switches for Linux version for TAR archives:
-snoi : store owner/group ids in archive or set owner/group ids from archive to extracted files.
-snon : store owner/group names in archive
- New -snz switch to propagate Zone.Identifier stream to extracted files (Windows).
- New option "Propagate Zone.Id stream" in Tools/Options/7-Zip menu.
- New "Options" window in "Add to archive" allows to select what metadata must be
included to archive. Also it allows to select new option
"Do not change source files last access time".
- Some bugs were fixed.
21.07 2021-12-26
-------------------------
- 7-Zip now can extract VHDX disk images (Microsoft Hyper-V Virtual Hard Disk v2 format).
- New switches: -spm and -im!{file_path} to exclude directories from processing
for specified paths that don't contain path separator character at the end of path.
- In the "Add to Archive" window, now it is allowed to use -m prefix for "Parameters"
field as in command line: -mparam.
- The sorting order of files in archives was slightly changed to be more consistent
for cases where the name of some directory is the same as the prefix part of the name
of another directory or file.
- TAR archives created by 7-Zip now are more consistent with archives created by GNU TAR program.
21.06 2021-11-24
-------------------------
- The window "Add to Archive" now allows to set a limit on memory usage (RAM)
that will be used for compressing.
- New switch -mmemuse={N}g / -mmemuse=p{N} to set a limit on memory usage (RAM)
for compressing and decompressing.
- Bug in versions 21.00-21.05 was fixed:
7-Zip didn't set attributes of directories during archive extracting.
- Some bugs were fixed.
21.04 beta 2021-11-02
-------------------------
- 7-Zip now reduces the number of working CPU threads for compression,
if RAM size is not enough for compression with big LZMA2 dictionary.
- 7-Zip now can create and check "file.sha256" text files that contain the list
of file names and SHA-256 checksums in format compatible with sha256sum program.
7-Zip can work with such checksum files as with archives,
but these files don't contain real file data.
The context menu commands to create and test "sha256" files:
7-Zip / CRC SHA / SHA-256 -> file.sha256
7-Zip / CRC SHA / Test Archive : Checksum
The commands for command line version:
7z a -thash file.sha256 *.txt
7z t -thash file.sha256
7z t -thash -shd. file.sha256
New -shd{dir_path} switch to set the directory that is used to check files
referenced by "file.sha256" file for "Test" operation.
If -shd{dir_path} is not specified, 7-Zip uses the directory where "file.sha256" is stored.
- New -xtd switch to exclude directory metadata records from processing.
21.03 beta 2021-07-20
-------------------------
- The maximum dictionary size for LZMA/LZMA2 compressing was increased to 4 GB (3840 MiB).
- Minor speed optimizations in LZMA/LZMA2 compressing.
21.02 alpha 2021-05-06
-------------------------
- 7-Zip now writes additional field for filename in UTF-8 encoding to zip archives.
It allows to extract correct file name from zip archives on different systems.
- The command line version of 7-Zip for macOS was released.
- The speed for LZMA and LZMA2 decompression in arm64 versions for macOS and Linux
was increased by 20%-60%.
- Some changes and improvements in ZIP, TAR and NSIS code.
21.01 alpha 2021-03-09
-------------------------
- The command line version of 7-Zip for Linux was released.
- The improvements for speed of ARM64 version using hardware CPU instructions
for AES, CRC-32, SHA-1 and SHA-256.
- The bug in versions 18.02 - 21.00 was fixed:
7-Zip could not correctly extract some ZIP archives created with xz compression method.
- Some bugs were fixed.
21.00 alpha 2021-01-19
-------------------------
- Some internal changes in code.
- Some bugs were fixed.
- New localizations: Tajik, Uzbek (Cyrillic)
20.02 alpha 2020-08-08
-------------------------
- The default number of LZMA2 chunks per solid block in 7z archive was increased to 64.
It allows to increase the compression speed for big 7z archives, if there is a big number
of CPU cores and threads.
- The speed of PPMd compressing/decompressing was increased for 7z/ZIP/RAR archives.
- The new -ssp switch. If the switch -ssp is specified, 7-Zip doesn't allow the system
to modify "Last Access Time" property of source files for archiving and hashing operations.
- Some bugs were fixed.
- New localization: Swahili.
20.00 alpha 2020-02-06
-------------------------
- 7-Zip now supports new optional match finders for LZMA/LZMA2 compression: bt5 and hc5,
that can work faster than bt4 and hc4 match finders for the data with big redundancy.
- The compression ratio was improved for Fast and Fastest compression levels with the
following default settings:
- Fastest level (-mx1) : hc5 match finder with 256 KB dictionary.
- Fast level (-mx3) : hc5 match finder with 4 MB dictionary.
- Minor speed optimizations in multithreaded LZMA/LZMA2 compression for Normal/Maximum/Ultra
compression levels.
- bzip2 decoding code was updated to support bzip2 archives, created by lbzip2 program.
- Some bugs were fixed.
- New localization: Turkmen.
19.02 alpha 2019-09-05
-------------------------
- 7-Zip now can unpack files encoded with Base64 encoding (b64 filename extension).
- 7-Zip now can use new x86/x64 hardware instructions for SHA-1 and SHA-256, supported
by AMD Ryzen and latest Intel CPUs: Ice Lake and Goldmont.
It increases
- the speed of SHA-1/SHA-256 hash value calculation,
- the speed of encryption/decryption in zip AES,
- the speed of key derivation for encryption/decryption in 7z/zip/rar archives.
- The speed of zip AES encryption and 7z/zip/rar AES decryption was increased with
the following improvements:
- 7-Zip now can use new x86/x64 VAES (AVX Vector AES) instructions, supported by
Intel Ice Lake CPU.
- The existing code of x86/x64 AES-NI was improved also.
- There is 2% speed optimization in 7-Zip benchmark's decompression.
- Some bugs were fixed.
19.00 2019-02-21
-------------------------
- Encryption strength for 7z archives was increased:
the size of random initialization vector was increased from 64-bit to 128-bit,
and the pseudo-random number generator was improved.
- Some bugs were fixed.
18.06 2018-12-30
-------------------------
- The speed for LZMA/LZMA2 compressing was increased by 3-10%,
and there are minor changes in compression ratio.
- Some bugs were fixed.
- The bug in 7-Zip 18.02-18.05 was fixed: there was memory leak in xz decoder.
- 7-Zip 18.02-18.05 used only one CPU thread for bz2 archive creation.
18.05 2018-04-30
-------------------------
- The speed for LZMA/LZMA2 compressing was increased
by 8% for fastest/fast compression levels and
by 3% for normal/maximum compression levels.
- 7-Zip now shows Properties (Info) window and CRC/SHA results window
as "list view" window instead of "message box" window.
- Some improvements in zip, hfs and dmg code.
- Previous versions of 7-Zip could work incorrectly in "Large memory pages" mode in
Windows 10 because of some BUG with "Large Pages" in Windows 10.
Now 7-Zip doesn't use "Large Pages" on Windows 10 up to revision 1709 (16299).
- The vulnerability in RAR unpacking code was fixed (CVE-2018-10115).
- Some bugs were fixed.
18.03 beta 2018-03-04
-------------------------
- The speed for single-thread LZMA/LZMA2 decoding
was increased by 30% in x64 version and by 3% in x86 version.
- 7-Zip now can use multi-threading for 7z/LZMA2 decoding,
if there are multiple independent data chunks in LZMA2 stream.
- 7-Zip now can use multi-threading for xz decoding,
if there are multiple blocks in xz stream.
- New localization: Kabyle.
- Some bugs were fixed.
18.01 2018-01-28
-------------------------
- 7-Zip now can unpack DMG archives that use LZFSE compression method.
- 7-Zip now doesn't allow update operation for archives that have read-only attribute.
- The BUG was fixed:
extracting from tar with -si switch didn't set timestamps for directories.
- Some bugs were fixed.
18.00 beta 2018-01-10
-------------------------
- 7-Zip now can unpack OBJ/COFF files.
- new -sse switch to stop archive creating, if 7-Zip can't open some input file.
- Some bugs were fixed.
17.01 beta 2017-08-28
-------------------------
- 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 beta 2017-04-29
-------------------------
- 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 2016-10-04
-------------------------
- 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 2016-09-28
-------------------------
- 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 2016-05-21
-------------------------
- 7-Zip now can extract multivolume ZIP archives (z01, z02, ... , zip).
- Some bugs were fixed.
15.14 2015-12-31
-------------------------
- 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 2015-11-19
-------------------------
- The release version.
15.11 beta 2015-11-14
-------------------------
- Some bugs were fixed.
15.10 beta 2015-11-01
-------------------------
- 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.
15.09 beta 2015-10-16
-------------------------
- 7-Zip now can extract ext2 and multivolume VMDK images.
- Some bugs were fixed.
15.08 beta 2015-10-01
-------------------------
- 7-Zip now can extract ext3 and ext4 (Linux file system) images.
- Some bugs were fixed.
15.07 beta 2015-09-17
-------------------------
- 7-Zip now can extract GPT images and single file QCOW2, VMDK, VDI images.
- 7-Zip now can extract solid WIM archives with LZMS compression.
- Some bugs were fixed.
15.06 beta 2015-08-09
-------------------------
- 7-Zip now can extract RAR5 archives.
- 7-Zip now doesn't sort files by type while adding to solid 7z archive.
- new -mqs switch to sort files by type while adding to solid 7z archive.
- The BUG in 7-Zip File Manager was fixed:
The "Move" operation to open 7z archive didn't delete empty files.
- The BUG in 15.05 was fixed:
console version added some text to the end of stdout stream, is -so switch was used.
- The BUG in 9.30 - 15.05 was fixed:
7-Zip could not open multivolume sfx RAR archive.
- Some bugs were fixed.
15.05 beta 2015-06-14
-------------------------
- 7-Zip now uses new installer.
- 7-Zip now can create 7z, xz and zip archives with 1536 MB dictionary for LZMA/LZMA2.
- 7-Zip File Manager now can operate with alternate file streams at NTFS
volumes via "File / Alternate Streams" menu command.
- 7-Zip now can extract .zipx (WinZip) archives that use xz compression.
- new optional "section size" parameter for BCJ2 filter for compression ratio improving.
Example: -mf=BCJ2:d9M, if largest executable section in files is smaller than 9 MB.
- Speed optimizations for BCJ2 filter and SHA-1 and SHA-256 calculation.
- Console version now uses stderr stream for error messages.
- Console version now shows names of processed files only in progress line by default.
- new -bb[0-3] switch to set output log level. -bb1 shows names of processed files in log.
- new -bs[o|e|p][0|1|2] switch to set stream for output messages;
o: output, e: error, p: progress line; 0: disable, 1: stdout, 2: stderr.
- new -bt switch to show execution time statistics.
- new -myx[0-9] switch to set level of file analysis.
- new -mmtf- switch to set single thread mode for filters.
- The BUG was fixed:
7-Zip didn't restore NTFS permissions for folders during extracting from WIM archives.
- The BUG was fixed:
The command line version: if the command "rn" (Rename) was called with more
than one pair of paths, 7-Zip used only first rename pair.
- The BUG was fixed:
7-Zip crashed for ZIP/LZMA/AES/AES-NI.
- The BUG in 15.01-15.02 was fixed:
7-Zip created incorrect ZIP archives, if ZipCrypto encryption was used.
7-Zip 9.20 can extract such incorrect ZIP archives.
- Some bugs were fixed.
9.38 beta 2015-01-03
-------------------------
- Some bugs were fixed.
9.36 beta 2014-12-26
-------------------------
- The BUG in command line version was fixed:
7-Zip created temporary archive in current folder during update archive
operation, if -w{Path} switch was not specified.
The fixed 7-Zip creates temporary archive in folder that contains updated archive.
- The BUG in 9.33-9.35 was fixed:
7-Zip silently ignored file reading errors during 7z or gz archive creation,
and the created archive contained only part of file that was read before error.
The fixed 7-Zip stops archive creation and it reports about error.
- Some bugs were fixed.
9.35 beta 2014-12-07
-------------------------
- The BUG was fixed:
7-Zip crashed during ZIP archive creation, if the number of CPU threads was more than 64.
- The BUG in 9.31-9.34 was fixed:
7-Zip could not correctly extract ISO archives that are larger than 4 GiB.
- The BUG in 9.33-9.34 was fixed:
The option "Compress shared files" and -ssw switch didn't work.
- The BUG in 9.26-9.34 was fixed:
7-Zip File Manager could crash for some archives open in "Flat View" mode.
- Some bugs were fixed.
9.34 alpha 2014-06-22
-------------------------
- The BUG in 9.33 was fixed:
Command line version of 7-Zip could work incorrectly, if there is relative
path in exclude filename optiton (-x) and absolute path as include filename.
- The BUG in 9.26-9.33 was fixed:
7-Zip could not open some unusual 7z archives that were created by another
software (not by 7-Zip).
- The BUG in 9.31-9.33 was fixed:
7-Zip could crash with switch -tcab.
9.33 alpha 2014-06-15
-------------------------
- 7-Zip now can show icons for 7-Zip items in Explorer's context menu.
- "Add to archive" dialog box:
- new options in "Path Mode"
- new option "Delete files after compression"
- new "NTFS" options for WIM and TAR formats:
- Store symbolic links
- Store hard links
- Store alternate data streams
- Store file security
- "Extract" dialog box:
- new optional field to set output folder name
- new option "Eliminate duplication of root folder"
- new option "Absolute pathnames" in "Path Mode".
- new option "Restore file security" (that works for WIM archives only)
- 7-Zip File Manager:
- new "File / Link" dialog box in to create symbolic links and hard links.
- Command line version:
- new -spd switch to Disable wildcard matching for file names
- new -spe switch to Eliminate duplication of root folder for extract archive command
- new -snh switch to store hard links as links (WIM and TAR formats only)
- new -snl switch to store symbolic links as links (WIM and TAR formats only)
- NSIS support was improved.
- The problem was fixed:
The command "extract to \*" with multiple archives could use same
output folder, if archives are placed inside PE (EXE) file.
- The BUG of 9.31-9.32 was fixed:
Command line version for test and extract commands returned the
value 0 as exit code, if it couldn't open archive.
- The BUG was fixed:
7-Zip could not create archives with anti-items for any archive type,
except of 7z type
- Some bugs were fixed.
- New localization: Mongolian (script).
9.32 alpha 2013-12-01
-------------------------
- 7-Zip now can create multivolume SFX archives in 7z format.
Standalone sfx module now can unpack external 7z archive with name that is
matched to name of sfx module. For example, sfx module renamed to archive.exe
can unpack archive.7z or archive.7z.001 .
- ZIP, NSIS, HFS, AR support was improved.
- 7-Zip now supports files larger than 4 GiB in ISO archives.
- Improved compression ratio in 7z format with maximum or ultra level for
executable files (EXE and DLL) that are larger than 16 MB (improved BCJ2 filter).
- Improved support for file pathnames longer than 260 characters.
- CRC and SHA checksum calculation for files can be called via Explorer's context menu.
- 7-Zip File Manager now also takes into account the numbers in filenames for sorting order.
- 7-Zip File Manager now can use RAM buffers instead of temp files to open
nested archives, if temp file is smaller than 1/4 of RAM size.
- 7-Zip File Manager can open files in "Parser" mode via "Open Archive > #" context
menu command. It shows the list of archives inside file.
- Command line version:
- new -t# switch to open file in "Parser" mode and show the list of archives inside file.
- new -stx{Type} switch to exclude archive type from using.
- -scs switch now supports UTF-16 encoding.
- now it shows time and memory usage statistics at the end of execution.
- The BUGs were fixed:
- 7-Zip 9.30 and early versions created ZIP archives with minor errors
in extra field of headers for directory items, if AES (WinZip-AES) encryption was used.
- 7-Zip could work incorrectly in decompression of more than one
multi-volume archive in one command.
- 7-Zip 9.24 alpha - 9.30 alpha versions could not extract ZIP archives
encrypted with PKWARE-AES method.
- Minimum supported system now is Windows 2000. 7-Zip doesn't work on Windows 95/98/ME.
- New localization: Irish.
9.30 alpha 2012-10-26
-------------------------
- LZMA2 now is default compression method for .7z format.
- 7-Zip now can update WIM archives.
- 7-Zip File Manager now can move files to archives.
- The default encoding for TAR format now is UTF-8. You can use -mcp=1 switch for OEM encoding.
- Command line version:
- new "rn" command to rename files in archive.
- new -sdel switch to delete files after including to archive.
- new -sns switch to store NTFS alternate streams (for WIM format only).
- new -sni switch to store NT security information for files (for WIM format only).
- new -stl switch to set archive timestamp from the most recently modified file.
- Speed optimizations for opening big archives and big disk folders.
- 7-Zip now writes special padding blocks to headers of 7z archives for
faster archive opening. Note that 7-Zip 4.50 - 4.58 contain BUG,
so these old versions can't correctly work with such new 7z archives.
- DMG support was improved
- Some bugs were fixed.
- The BUG in 7-Zip 9.26 alpha - 9.29 alpha versions was fixed.
These alpha versions could not open non-solid 7z archive, if
some files were skipped during creation of that archive.
That problem is also related to 7z archives created in solid mode,
if each solid block contains no more than one file.
Note: 7-Zip skips files that were open for writing by another
application and shows warning in that case.
- New localization: Aragonese.
9.25 alpha 2011-09-16
-------------------------
- LZMA decompression speed was improved.
- "compress and send to email" code was improved to support more email clients.
- New command "h" to calculate hash values CRC-32, CRC-64, SHA-256 or SHA-1 for files on disk.
- New -spf switch to store full file paths including drive letter to archive.
If you use that switch with extract command, please check that file names in archive are correct.
- Some bugs were fixed.
9.23 alpha 2011-06-07
-------------------------
- The format of language files was changed.
- Some bugs were fixed.
- New localization: Karakalpak.
9.22 beta 2011-04-18
-------------------------
- 7-Zip now uses progress indicator displayed on a taskbar button under Windows 7.
- The BUG in 7-Zip 9.21 beta was fixed:
7-Zip could ignore some options when you created ZIP archives.
For example, it could use ZipCrypto cipher instead of AES-256.
9.21 beta 2011-04-11
-------------------------
- 7-Zip now can unpack UEFI BIOS files.
- 64-bit version of 7-Zip now includes additional 32-bit shell extension DLL.
So other 32-bit programs can call 64-bit 7-Zip via context menu.
- Now it's possible to associate 7-Zip with file types without Administrator rights.
- New -mf=FilterID switch to specify compression filter. Examples:
7z a -mf=bcj2 a.7z a.tar
7z a -mf=delta:4 a.7z a.wav
7z a -mf=bcj a.tar.xz a.tar
- 32-bit 7-Zip running under 64-bit Windows now can use up to 4 GB of RAM.
- Some bugs were fixed.
- New localizations: Corsican, Kyrgyz, Ligurian.
9.20 2010-11-18
-------------------------
- Some bugs were fixed.
9.19 beta 2010-11-11
-------------------------
- The console version now doesn't show entered password.
- Some bugs were fixed.
9.18 beta 2010-11-02
-------------------------
- 7-Zip now can unpack SquashFS and CramFS filesystem images.
- 7-Zip now can unpack some TAR and ISO archives with incorrect headers.
- New small SFX module for installers (in Extra package).
- Some bugs were fixed.
9.17 beta 2010-10-04
-------------------------
- Disk fragmentation problem for ZIP archives created by 7-Zip was fixed.
9.16 beta 2010-09-08
-------------------------
- 7-Zip now supports files that are larger than 8 GB in TAR archives.
- NSIS support was improved.
- Some bugs were fixed.
- New localizations: Hindi, Gujarati, Sanskrit.
9.15 beta 2010-06-20
-------------------------
- Some bugs were fixed.
- New localization: Tatar.
9.14 beta 2010-06-04
-------------------------
- WIM support was improved.
9.13 beta 2010-04-15
-------------------------
- 7-Zip now stores NTFS file timestamps to ZIP archives.
- New additional "Open archive >" item in context menu allows to select
archive type for some files.
- Some bugs were fixed.
- New localization: Uyghur.
9.12 beta 2010-03-24
-------------------------
- ZIP / PPMd compression ratio was improved in Maximum and Ultra modes.
- The BUG in 7-Zip 9.* beta was fixed: LZMA2 codec didn't work,
if more than 10 threads were used (or more than 20 threads in some modes).
9.11 beta 2010-03-15
-------------------------
- 7-Zip now supports PPMd compression in ZIP archives.
- Speed optimizations in PPMd codec.
- The support for archives in installers was improved.
- Some bugs were fixed.
- New localization: Kazakh.
9.10 beta 2009-12-22
-------------------------
- The BUG in 7-Zip 9.09 beta was fixed:
7-Zip created incorrect ZIP archives, if ZipCrypto encryption was used.
9.09 beta 2009-12-12
-------------------------
- 7-Zip now can unpack Apple Partition Map (APM) disk images.
- Speed optimizations in AES code for Intel's 32nm CPUs.
- Speed optimizations in CRC calculation code for Intel's Atom CPUs.
- Some bugs were fixed.
9.07 beta 2009-08-27
-------------------------
- It's possible to specify Diff program in options (7-Zip File Manager).
- Some bugs were fixed.
9.06 beta 2009-08-17
-------------------------
- 7-Zip now can unpack MSLZ archives.
- Partial parsing for EXE resources, SWF and FLV.
- Some bugs were fixed.
9.04 beta 2009-05-30
-------------------------
- 7-Zip now can update solid .7z archives.
- 7-Zip now supports LZMA2 compression method.
- 7-Zip now supports XZ archives.
- 7-Zip now can unpack NTFS, FAT, VHD and MBR archives.
- 7-Zip now can unpack GZip, BZip2, LZMA, XZ and TAR archives from stdin.
- 7-Zip now can open/copy/compress disk images (like \\.\c:) from \\.\ folder.
- 7-Zip File Manager now doesn't use temp files to open nested archives
stored without compression.
- New -scrc switch to calculate total CRC-32 during extracting / testing.
- New -scc{WIN|DOS|UTF-8} switch to specify charset for console input/output (default = DOS).
- Some bugs were fixed.
4.65 2009-02-03
-------------------------
- 7-Zip File Manager now can calculate SHA-256 checksum.
- Some bugs were fixed.
4.64 2009-01-03
-------------------------
- The bug in 7-Zip 4.63 was fixed: 7-Zip could not decrypt .ZIP archives
encrypted with WinZip-AES method.
4.63 2008-12-31
-------------------------
- 7-Zip now can unpack ZIP archives encrypted with PKWARE-AES.
- Some bugs were fixed.
4.62 2008-12-02
-------------------------
- Some bugs were fixed.
4.61 beta 2008-11-23
-------------------------
- 7-Zip now supports LZMA compression for .ZIP archives.
- Some bugs were fixed.
- New localization: Sinhala.
4.60 beta 2008-08-19
-------------------------
- Some bugs were fixed.
4.59 beta 2008-08-13
-------------------------
- 7-Zip now can unpack UDF, XAR and DMG/HFS archives.
- 7-Zip File Manager now keeps encryption when you edit encrypted file inside archive.
- 7-Zip File Manager now allows to change current folder from the address bar drop-down list.
- It's allowed to use -t switch for "list" and "extract" commands.
- Some bugs were fixed.
- New localizations: Icelandic, Kurdish Sorani.
4.58 beta 2008-05-05
-------------------------
- Some speed optimizations.
- 7-Zip now can unpack .lzma archives.
- Unicode (UTF-8) support for filenames in .ZIP archives. Now there are 3 modes:
1) Default mode: 7-Zip uses UTF-8, if the local code page doesn't contain required symbols.
2) -mcu switch: 7-Zip uses UTF-8, if there are non-ASCII symbols.
3) -mcl switch: 7-Zip uses local code page.
- Now it's possible to store file creation time in 7z and ZIP archives (-mtc switch).
- 7-Zip now can unpack multivolume RAR archives created with
"old style volume names" scheme and names *.001, *.002, ...
- Now it's possible to use -mSW- and -mSW+ switches instead of -mSW=off and -mSW=on
- Some bugs were fixed.
- New localizations: Punjabi (Indian), Pashto.
4.57 2007-12-06
-------------------------
- The BUG in command line version was fixed: -up3 switch
could work incorrectly.
4.56 beta 2007-10-24
-------------------------
- Some bugs were fixed.
4.55 beta 2007-09-05
-------------------------
- Some bugs were fixed.
4.54 beta 2007-09-04
-------------------------
- Decompression speed was increased.
4.53 beta 2007-08-27
-------------------------
- "Test" and "Info" buttons now work for open archives.
- The bug in 7-Zip 4.48 - 4.52 beta was fixed:
7-Zip could create .ZIP archives with broken files.
- Some bugs were fixed.
4.52 beta 2007-08-03
-------------------------
- 7-Zip now can unpack Compound files (msi, doc, ...).
- Some bugs were fixed.
4.51 beta 2007-07-25
-------------------------
- Bug was fixed: 7-Zip 4.50 beta could not open some .7z archives.
4.50 beta 2007-07-24
-------------------------
- New switch for command line version:
-ssc[-] enables/disables case-sensitive mode for file names.
- Speed optimizations for AES encryption.
- Some bugs were fixed.
4.49 beta 2007-07-11
-------------------------
- 7-Zip now can unpack WIM archives.
- 7-Zip now replaces incorrect characters in filenames during extracting.
4.48 beta 2007-06-26
-------------------------
- Encryption strength for .7z format was increased.
Now it uses random initialization vectors.
- Some bugs were fixed.
4.47 beta 2007-05-27
-------------------------
- Bugs of 7-Zip 4.46 beta were fixed: BZip2 could work incorrectly.
4.46 beta 2007-05-25
-------------------------
- New fast compression mode for Deflate method in Zip and GZip.
- New "Compress shared files" option in GUI and -ssw switch.
- Some bugs were fixed.
- New localization: Norwegian Nynorsk.
4.45 beta 2007-04-17
-------------------------
- Now it's possible to specify the size of solid block and the number
of CPU threads in "Add to archive" dialog box.
- Default dictionary size was increased: Normal: 16 MB, Max: 32 MB.
- Speed optimizations.
- Benchmark was improved (new "b" command in command line version).
- The number of DLL files was reduced.
- Now it's possible to associate 7-zip with combined types like .tbz2
- switch -mhcf=off is not supported now.
- If -t{Type} switch is not specified, 7-Zip now uses extension of archive to
detect the type of archive.
- Some bugs were fixed.
- New localization: Welsh.
4.44 beta 2007-01-20
-------------------------
- Speed optimizations for LZMA, Deflate, BZip2 and unRAR.
- 7-Zip now supports file pathnames longer than 260 characters.
- Some bugs were fixed.
- New localizations: Bangla, Bashkir, Nepali.
4.43 beta 2006-09-15
-------------------------
- 7-Zip now can use multi-threading mode for compressing to .ZIP archives.
- ZIP format supporting was improved.
- 7-Zip now supports WinZip-compatible AES-256 encryption for .ZIP archives.
- New context menu items for .ZIP archives creating.
- 7-Zip now uses order list (list of extensions) for files sorting for compressing
to .7z archives. It can slightly increase compression ratio in some cases.
- 7-Zip now restores modification time of folders during .7z archives extracting.
- Some bugs were fixed.
- New localizations: Armenian, Marathi.
4.42 2006-05-14
-------------------------
- Compressing speed and Memory requirements were increased.
Default dictionary size was increased: Fastest: 64 KB, Fast: 1 MB,
Normal: 4 MB, Max: 16 MB, Ultra: 64 MB.
- BZip2 compressing / decompressing now can work in multi-threading mode
- Multi-threading mode now is default for multi-processor systems
- 64-bit version now supports 1 GB dictionary
- 7z/LZMA now can use only these match finders: HC4, BT2, BT3, BT4
- Compression ratio in Zip/GZip/Deflate in Ultra mode was increased
- 7-Zip now can unpack ISO archives and some installers created by NSIS
- Optional "Flat View" mode in 7-Zip File Manager
- 7-Zip File Manager now can calculate CRC checksums for files
- -x switch with relative paths now affects files specified with absolute paths
- New switch for 7za.exe (console version): -slt.
"l" (list) command with -slt shows technical information for archive.
- New switch: -scs{WIN|DOS|UTF-8} specifies charset for list files.
Default charset for list files is UTF-8 now.
- Some bugs were fixed
- New localizations: Albanian, Kurdish
4.32 2005-12-09
-------------------------
- Bug was fixed: 7-Zip 4.31 didn't work in Windows 95
4.31 2005-12-04
-------------------------
- Small changes
- New localization: Basque
4.30 beta 2005-11-18
-------------------------
- Files 7zFMn.exe, 7zGn.exe, 7-zipn, 7za.exe, 7zC.sfx were removed from 7-zip package
- 7-Zip now uses uncompressed SFX: 7z.sfx
- Sfx modules 7z.sfx and 7zCon.sfx now use msvcrt.dll
- Speed optimizations in LZMA maximum/ultra compressing.
- LZMA now supports word size up to 273
- 7-Zip now reduces dictionary size for LZMA, if you compress files
smaller than specified dictionary size.
- 7-Zip now can use large memory pages:
GUI: 7-Zip File Manager / Options / Settings / Use large memory pages.
Command line version: -slp switch.
This feature allows to increase speed of compressing.
But 7-Zip can make some pause at starting of compressing for allocating large pages.
Also Task Manager doesn't show real memory usage of program, if 7-Zip uses large pages.
This feature works only on Windows 2003 / XP x64 / Vista.
Also you must have administrator's rights for your system.
Recommended size of RAM: 1 GB or more.
To install this feature you must run 7-Zip File Manager at least once,
close it and reboot system.
- Some bugs were fixed
4.29 beta 2005-09-28
-------------------------
- Bug was fixed: 7-Zip 4.28 beta worked incorrectly in Windows 95/98/Me
4.28 beta 2005-09-27
-------------------------
- Bug was fixed: 7-Zip 4.27 beta created incorrect multivolume archives.
- "Duplicate filename" collision problem between names with ligatures was fixed.
4.27 beta 2005-09-21
-------------------------
- 7-Zip can unpack CHM/HXS (MS HTML HELP) archives
- 7-Zip can unpack multivolume CAB archives
- Now 7-Zip deletes files to the Recycle Bin by default.
Shift+Delete deletes files permanently.
- Some bugs were fixed
- New localization: Tatarish
4.26 beta 2005-08-05
-------------------------
- LZH format support (extracting only)
- Some bugs were fixed
- New localization: Ido
4.25 beta 2005-07-31
-------------------------
- 7-Zip now doesn't interrupt the compressing when it can not
find specified file as in version 4.24 beta. It just shows warning.
- 7-Zip now supports standard selection mode in the file list
- Some bugs were fixed
4.24 beta 2005-07-06
-------------------------
- 7-Zip now supports right-click Drag and Drop in Explorer
- Command line version now supports short file names (like FILENA~1.TXT)
- If there are no wildcard names and there is no -r switch in command line,
7-Zip now checks that specified files exist on disk before compressing.
- Some bugs were fixed
4.23 2005-06-29
-------------------------
- Drag and Drop support
- 7-Zip File Manager now can copy files from one archive to another
- Some bugs were fixed
- New localizations: Extremaduran, Malay
4.20 2005-05-30
-------------------------
- No changes
4.19 beta 2005-05-21
-------------------------
- BZip2 code was rewritten. Now it supports 3 modes: Normal, Maximum and
Ultra. In Normal mode it compresses almost as original BZip2 compressor.
Compression ratio in Maximum and Ultra modes is 1-3% better for some files,
but Maximum Mode is about 3 times slower and Ultra Mode is about 8 times
slower than Normal mode.
- Console version now prints all messages to stdout by default,
and if -so switch is specified, 7-Zip prints messages to stderr.
- Some bugs were fixed
- New localizations: Azeri, Georgian
4.18 beta 2005-04-19
-------------------------
- Bug in v4.17 beta was fixed: 7-Zip File Manager could crash
after some operations with archives
4.17 beta 2005-04-18
-------------------------
- To increase protection from viruses, 7-Zip now does not open
files with more than 4 continuous spaces in the name.
And 7-Zip changes such long spaces in name to " ... " in the file list.
- Code size optimization