Zstandard
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|subcat=Compression | |subcat=Compression | ||
|extensions={{ext|zst}} | |extensions={{ext|zst}} | ||
| + | |mimetypes={{mimetype|application/zstd}} | ||
|released=2015 | |released=2015 | ||
}} | }} | ||
'''Zstandard''', or '''Zstd''', is a general-purpose compression algorithm and file format. It is designed to have a good balance between compression ratio, compression speed, and decompression speed. | '''Zstandard''', or '''Zstd''', is a general-purpose compression algorithm and file format. It is designed to have a good balance between compression ratio, compression speed, and decompression speed. | ||
| + | Zstandard is able to use [[Zstandard dictionary|a "dictionary" format]] to make compression of files of an already known type more efficient. | ||
== Identification == | == Identification == | ||
| − | For at least some versions of Zstd format, files begin with signature bytes {{magic|25 b5 2f fd}}. | + | For at least some versions of Zstd format, files begin with signature bytes {{magic|25 b5 2f fd}}. For files created since version 0.8.0 (August 2016<ref>https://github.com/facebook/zstd/releases/tag/v0.8.0</ref>), the header is instead {{magic|28 b5 2f fd}}<ref>https://github.com/facebook/zstd/blob/dev/lib/zstd.h, definition of ZSTD_MAGICNUMBER</ref>. |
== Software == | == Software == | ||
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* RFC 8478 | * RFC 8478 | ||
* [[Wikipedia: Zstandard]] | * [[Wikipedia: Zstandard]] | ||
| + | |||
| + | == References == | ||
| + | <references /> | ||
[[Category:Facebook]] | [[Category:Facebook]] | ||
Latest revision as of 13:11, 12 May 2019
Zstandard, or Zstd, is a general-purpose compression algorithm and file format. It is designed to have a good balance between compression ratio, compression speed, and decompression speed.
Zstandard is able to use a "dictionary" format to make compression of files of an already known type more efficient.
Contents |
[edit] Identification
For at least some versions of Zstd format, files begin with signature bytes 25 b5 2f fd. For files created since version 0.8.0 (August 2016[1]), the header is instead 28 b5 2f fd[2].
[edit] Software
- Zstandard →
zstd,unzstd,zstdcat
[edit] Links
[edit] References
- ↑ https://github.com/facebook/zstd/releases/tag/v0.8.0
- ↑ https://github.com/facebook/zstd/blob/dev/lib/zstd.h, definition of ZSTD_MAGICNUMBER
