Previous versions kept all volumes in open state until the end of the archive creation. When new 7-Zip creates multivolume archive, 7-Zip keeps in open state only volumes that still can be changed.Some changes and optimizations in WIM creation code.It can increase compression ratio for executable files larger than 64 MiB. Default section size for BCJ2 filter was changed from 64 MiB to 240 MiB.Previous versions by default used x86 filter BCJ or BCJ2 for all exe/dll files.ARM64 filter for ARM64 executable files.BCJ or BCJ2 filter for x86 executable files,.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:.ARM64 filter can increase compression ratio for data containing executable files compiled for ARM64 (AArch64) architecture. 7-Zip now can use new ARM64 filter for compression to 7z and xz archives.Self-extracting capability for 7z format.Strong AES-256 encryption in 7z and ZIP formats.Compression ratio for ZIP and GZIP formats: 2-10 % better than the ratio provided by PKZip and WinZip.High compression ratio in 7z format with LZMA compression.Unpacking only: AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2, RAR, RPM, SquashFS, UDF, UEFI, VDI, VHD, VMDK, WIM, XAR and Z.Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM.LZMA uses an LZ-based sliding dictionary of up to 4 GB in size, backed by a range coder. Developed by Pavlov, LZMA is a relatively new system, making its debut as part of the 7z format. The core 7z compression uses a variety of algorithms, the most common of which are bzip2, PPMd, LZMA2, and LZMA. These can consist of pre-processors, compression algorithms, and encryption filters. As a container format, security or size reduction are achieved using a stacked combination of filters. Each archive can contain multiple directories and files. It is developed by Igor Pavlov and was first released in 1999.īy default, 7-Zip creates 7z-format archives with a. It uses its own 7z archive format, but can read and write many other archive formats and offers a significantly higher compression ratio than its peers – up to 40% higher. 7-Zip is an open source file archiver with the high compression ratio for ZIP and GZIP formats, It’s a free alternative to the popular shareware archivers WinRAR and WinZip.
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