Il s’agit d’un puissant utilitaire de compression/décompression gratuit. Très utile, il permet de compresser en zip avec un taux de compression bien plus élevé que les autres compresseurs de format. De plus son célèbre format 7z permet de compresser jusqu’à 50% de + que le zip classique sur certaines archives et davantage que le format RAR (de Winrar).
Il est également capable de décompacter beaucoup de formats d’installeurs que plusieurs programmes utilisent (ce qui évite parfois une installation forcée). Très recommandé si vous voulez utiliser ZipMax, outil de l’auteur de ClrMAMEPro.
Les améliorations depuis la 19.00 sont les suivantes:
– 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.
– 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.
– 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 items from processing.
– The maximum dictionary size for LZMA/LZMA2 compressing was increased to 4 GB (3840 MiB).
– Minor speed optimizations in LZMA/LZMA2 compressing.
– 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.
– 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 internal changes in code.
– Some bugs were fixed.
– New localizations: Tajik, Uzbek (Cyrillic)
– 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.
– New localization: Swahili.
– 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.
– New localization: Turkmen.
– 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.
NB: Si des anciennes archives avaient des problèmes pour être ouvertes/extraites (ce qui devrait être très rare et dans des cas spécifiques), lire cette page.
Télécharger 7-Zip (x86) v25.00 (1.3 Mo)
