Shulou(Shulou.com)11/24 Report--

CTOnews.com January 16 news, 7-Zip ZS 22.01-v1.5.2-Release 1 pre-release version update, it is a development branch of 7-Zip. 21.03-v1.5.0-Release 2 was updated on October 6, 2021 according to the last version of the official update log.

Download address: https://github.com/mcmilk/7-Zip-zstd/releases

CTOnews.com with official update log:

New features and fixes for BUG:

Update 7-Zip to version 22.01

Update LZ4 to version 1.9.4

Update Zstandard to version 1.5.2

The compression compiler in this version:

Brotli Version 1.0.9

Fast LZMA2 1.0.1

Lizard Version 1.0

LZ4 Version 1.9.4

LZ5 Version 1.5

Zstandard Version 1.5.2

An introduction to the compiler is attached (the following information comes from the network):

Brotli:

A general lossless compression algorithm that uses a combination of a modern variant of the LZ77 algorithm, Huffman coding, and second-order context modeling to compress data with a compression ratio comparable to the best general compression method currently available. Its speed is similar to that of deflate, but provides more intensive compression.

Fast LZMA2:

A LZMA2 compression algorithm that is 20% to 100% faster than a normal LZMA2 at level 5 and above, but with a slightly lower compression ratio. It uses parallel buffer cardinality matchers and some optimizations of Zstandard. Codecs use much less extra memory per thread than standard LZMA2.

Lizard:

Is a fast decompression of the efficient compressor. It achieves the same compression ratio as zip / zlib and zstd / brotli (at low and medium compression levels) at 1000 MB/s and faster decompression speed.

Level 10.. 19 (fastLZ4) is designed to provide a decompression speed of about 10% higher than that of LZ4

Level 20.. 29 (LIZv1) is designed to provide a better ratio than LZ4 and maintain a 75% decompression speed.

Level 30.. 39 (fastLZ4 + Huffman) adds Huffman coding to fastLZ4

Level 40.. 49 (LIZv1 + Huffman) gives the best ratio, comparable to zlib and lower-level zstd / brotli, but with faster decompression speed

LZ4:

Lossless compression algorithm that provides a compression speed of 400 MB/s (0.16byte / cycle) per core. It has extremely fast decoders, and the speed of each core is GB / s (0.71byte / cycle). A highly compressed derivative called LZ4_HC can be used in exchange for customizable CPU time for compression ratio.

LZ5:

Is a modification of LZ4 to achieve a better ratio at the cost of slower compression and decompression. It has now been replaced by Lizard.

Zstandard:

A real-time compression algorithm that provides a high compression rate. It provides a very wide range of compression / speed tradeoffs and is supported by very fast decoders.

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