New update:
19.00 2019-02-21
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- 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.
If anyone is interested 7-Zip 19.02 alpha was released.
7-Zip / Discussion /
Open Discussion: 7-Zip 19.02 alpha
A new 7-Zip alpha7-Zip / Discussion /
Open Discussion: 7-Zip 20.00 alpha
20.00 alpha 2020-02-06
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- 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.
New Alpha version out 20.02: 7-Zip / Discussion /
Open Discussion: 7-Zip 20.02 alpha
20.02 alpha 2020-08-08
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- 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.
Notes about changes in 7-Zip 20.02
The size of solid block for 7z/LZMA2 archives was increased, so 7-Zip can use more threads and chunks to compress solid block. It can improve the compression speed for multi-core processors like Threadripper/Epyc and Xeon. Also it can slightly improve multi-core LZMA2 decompression speed.
Some important parts of PPMd code were rewritten for faster compression and decompression.
And that new PPMd code works faster for data that is not too compressible, like exe files or already compressed data.
Also PPMD in previous 7-Zip could be slow in some Intel CPUs for decompression, if CVE-2018-3639 Speculative Store Bypass (SSB) mitigation was enabled in system. And new PPMd code must work faster for such cases too.
Another change of 7-Zip 20.02 is speed optimization in Delta filter code, that is about two times faster than in previous version.
New 7-Zip beta
21.00 alpha 2021-01-19
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- Some internal changes in code.
- Some bugs were fixed.
- New localizations: Tajik, Uzbek (Cyrillic)
7-Zip / Discussion /
Open Discussion: 7-Zip 21.00 alpha
Thx Cliff.. You beat me too it lol..
I just noticed the update today and was gonna report it here..
New beta(download page): 7-Zip / Discussion /
Open Discussion: 7-Zip 21.01 alpha
There are now two versions, one for Windows, and one for Linux
21.01 alpha 2021-03-09
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- 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.
New beta(download page): 7-Zip / Discussion /
Open Discussion: 7-Zip 21.02 alpha
21.02 alpha 2021-05-06
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- 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.
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