A new p7zip fork with additional codecs and improvements (forked from https://sourceforge.net/projects/p7zip/).
This is the place for the active development of p7zip to include major modern codecs such as LZ4 and Zstd. In order to support multithreading for those addional codecs, this project depends on the Multithreading Library.
-
Zstandard v1.4.5 is a real-time compression algorithm, providing high compression ratios. It offers a very wide range of compression / speed trade-off, while being backed by a very fast decoder.
- Levels: 1..19
-
LZ4 v1.9.2 is lossless compression algorithm, providing compression speed at 400 MB/s per core (0.16 Bytes/cycle). It features an extremely fast decoder, with speed in multiple GB/s per core (0.71 Bytes/cycle). A high compression derivative, called LZ4_HC, is available, trading customizable CPU time for compression ratio.
- Levels: 1..12
-
Fast LZMA2 v1.0.1 is a LZMA2 compression algorithm, 20% to 100% faster than normal LZMA2 at levels 5 and above, but with a slightly lower compression ratio. It uses a parallel buffered radix matchfinder and some optimizations from Zstandard. The codec uses much less additional memory per thread than standard LZMA2.
- Levels: 1..9
We use silesia files(total size 211938580 Byte) for packaging. CPU frequency：2.20GHz
| format | method | encode_size(Byte) | encode_time(ms) | encode_speed(M/s) | decode_time(ms) | decode_speed(M/s) | compression_ratio |
|---|---|---|---|---|---|---|---|
| 7z-zip | deflaut-9 | 64727443 | 59170 ms | 3.33 | 1649 | 122.57 | 3.27 |
| 7z-7z | lzma-9 | 48752521 | 80680 ms | 2.51 | 3780 | 53.47 | 4.35 |
| 7z-7z | lzma2-9 | 48749147 | 81106 ms | 2.50 | 3742 | 54.01 | 4.35 |
| 7z-7z | zstd-22 | 52739879 | 134245 ms | 1.51 | 893 | 226.34 | 4.02 |
| 7z-7z | lz4-12 | 77788386 | 3548 ms | 56.97 | 409 | 494.18 | 2.72 |
| 7z-7z | flzma2-9 | 48676481 | 12619 ms | 16.02 | 3877 | 52.13 | 4.35 |
- git clone https://github.com/szcnick/p7zip.git
- cd p7zip && make 7z . (OR make 7za)
- ./bin/7z i . (OR 7za i)
The output should look like this:
7-Zip (a) [64] 17.02 : Copyright (c) 1999-2020 Igor Pavlov
p7zip Version 17.02 (locale=zh_CN.UTF-8,Utf16=on,HugeFiles=on,64 bits,12 CPUs x64)
Formats:
...
0 CK xz xz txz (.tar) FD 7 z X Z 00
0 Z z taz (.tar) 1F 9D
0 CK zstd zst tzstd (.tar) 0 x F D 2 F B 5 2 5 . . 0 x F D 2 F B 5 2 8 00
0 C F 7z 7z 7 z BC AF ' 1C
0 F Cab cab M S C F 00 00 00 00
...
Codecs:
0 4ED 303011B BCJ2
0 ED 3030103 BCJ
0 ED 3030205 PPC
0 ED 3030401 IA64
0 ED 3030501 ARM
0 ED 3030701 ARMT
0 ED 3030805 SPARC
0 ED 20302 Swap2
0 ED 20304 Swap4
0 ED 40202 BZip2
0 ED 0 Copy
0 ED 40109 Deflate64
0 ED 40108 Deflate
0 ED 3 Delta
0 ED 21 LZMA2
0 ED 30101 LZMA
0 ED 30401 PPMD
0 D 40301 Rar1
0 D 40302 Rar2
0 D 40303 Rar3
0 D 40305 Rar5
0 ED 4F71104 LZ4
0 ED 4F71101 ZSTD
0 ED 6F10701 7zAES
0 ED 6F00181 AES256CBC
1 3ED 4F712FF RawSplitter
Hashers:
0 4 1 CRC32
0 20 201 SHA1
0 32 A SHA256
0 8 4 CRC64
0 32 202 BLAKE2sp
- compression and decompression for LZ4 and Zstandard within the p7-Zip container format
- you can only create
.7zfiles, the files like.lz4and.zstare not covered by the plugins - when compressing binaries (*.exe, *.dll), you have to explicitly disable the bcj2 filter via
-m0=bcj. - so the usage should look like this:
7z a archiv.7z -m0=bcj -m1=zstd -mx1 Fast mode, with BCJ preprocessor on executables
7z a archiv.7z -m0=bcj -m1=zstd -mx.. ...
7z a archiv.7z -m0=bcj -m1=zstd -mx21 2nd Slowest Mode, with BCJ preprocessor on executables
7z a archiv.7z -m0=bcj -m1=zstd -mx22 Ultra Mode, with BCJ preprocessor on executables
7z a archiv.7z -m0=bcj -m1=lz4 -mxN ...
- the same as the Mainline 7-Zip, which means GNU LGPL
- p7zip Version 17.02
- LZ4 Version 1.9.2
- Zstandard Version 1.4.5
- Fast LZMA2 Version v1.0.1