Zstandard

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'''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 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>.
 
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>.

Revision as of 06:38, 12 May 2019

File Format
Name Zstandard
Ontology
Extension(s) .zst
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 is able to use a "dictionary" format to make compression of files of an already known type more efficient.

Contents

 [hide

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].

Software

Links

References

  1. https://github.com/facebook/zstd/releases/tag/v0.8.0
  2. https://github.com/facebook/zstd/blob/dev/lib/zstd.h, definition of ZSTD_MAGICNUMBER
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