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98 lines
3.5 KiB
Markdown
98 lines
3.5 KiB
Markdown
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# README
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This is the Github Page of 7-Zip with support for **zstd**, short for
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Zstandard, which is a fast lossless compression algorithm, targeting
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real-time compression scenarios at zlib-level compression ratio.
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You can install it in two ways:
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1. A full setup with ZStandard additions within the GUI and an modified
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Explorer context menu
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2. just the codec plugin, which goes to your existing 7-Zip installation
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## 7-Zip ZStandard Edition (full setup, with GUI and Explorer integration)
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### Installation
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1. download the setup from here for 32 bit: [7z1602-zstd-x32.exe](https://mcmilk.de/projects/7-Zip-zstd/dl/7z1602-zstd-x32.exe),
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or here for 64 bit [7z1602-zstd-x64.exe](https://mcmilk.de/projects/7-Zip-zstd/dl/7z1602-zstd-x64.exe)
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2. install it
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### Usage (full installation)
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```
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7z a archiv.7z -m0=zstd -mx0 Fastest Mode, without BCJ preprocessor
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7z a archiv.7z -m0=zstd -mx1 Fast mode, with BCJ preprocessor on executables
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7z a archiv.7z -m0=zstd -mx.. ...
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7z a archiv.7z -m0=zstd -mx21 2nd Slowest Mode, with BCJ preprocessor on executables
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7z a archiv.7z -m0=zstd -mx22 Ultra Mode, with BCJ preprocessor on executables
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```
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## ZStandard codec Plugin for 7-Zip
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### Installation
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1. download the codec archiv from https://mcmilk.de/projects/7-Zip-zstd/dl/Codecs.7z
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2. create a new directory named "Codecs"
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3. put in there the zstd-x32.dll or the zstd-x64.dll, depending on your 7-Zip installation
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- normally, the x32 should go to: "C:\Program Files (x86)\7-Zip\Codecs"
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- the x64 version should go in here: "C:\Program Files\7-Zip\Codecs"
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4. After this, you may check if the dll is correctly installed via this command: `7z.exe i`
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The output should look like this:
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```
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Codecs:
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0 ED 40202 BZip2
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0 4ED 303011B BCJ2
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0 ED 3030103 BCJ
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0 ED 3030205 PPC
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0 ED 3030401 IA64
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0 ED 3030501 ARM
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0 ED 3030701 ARMT
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0 ED 3030805 SPARC
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0 ED 20302 Swap2
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0 ED 20304 Swap4
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0 ED 0 Copy
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0 ED 40109 Deflate64
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0 ED 40108 Deflate
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0 ED 3 Delta
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0 ED 21 LZMA2
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0 ED 30101 LZMA
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0 ED 30401 PPMD
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0 ED 6F10701 7zAES
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0 ED 6F00181 AES256CBC
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1 D 40301 Rar1
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1 D 40302 Rar2
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1 D 40303 Rar3
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1 D 40305 Rar5
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1 ED 4F71101 ZSTD <-- NEW
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```
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### Usage (codec plugin)
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- when compressing binaries (*.exe, *.dll), you have to explicitly disable
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the bcj2 filter via `-m0=bcj`, when using only the plugin dll's
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- so the usage should look like this:
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```
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7z a archiv.7z -m0=bcj -m1=zstd -mx1 Fast mode, with BCJ preprocessor on executables
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7z a archiv.7z -m0=bcj -m1=zstd -mx.. ...
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7z a archiv.7z -m0=bcj -m1=zstd -mx21 2nd Slowest Mode, with BCJ preprocessor on executables
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7z a archiv.7z -m0=bcj -m1=zstd -mx22 Ultra Mode, with BCJ preprocessor on executables
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```
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## Links
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- [ZStandard Homepage](https://github.com/Cyan4973/zstd)
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- [7-Zip ZStandard Homepage: https://mcmilk.de/projects/7-Zip-zstd/)
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- Request for inclusion into the mainline 7-Zip: https://sourceforge.net/p/sevenzip/discussion/45797/thread/a7e4f3f3/
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- result, will not be included :(
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## Benchmarks with i7-3632QM cpu
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/TR 2016-08-15
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