jm + deflate   3

Evolving MySQL Compression - Part 2 | Pinterest Engineering
generating a near-optimal external dictionary for Zlib deflate compression
compression  deflate  zlib  pinterest  hacks  mysql 
7 weeks ago by jm
Brotli: a new compression algorithm for the internet from Google
While Zopfli is Deflate-compatible, Brotli is a whole new data format. This new format allows us to get 20–26% higher compression ratios over Zopfli. In our study ‘Comparison of Brotli, Deflate, Zopfli, LZMA, LZHAM and Bzip2 Compression Algorithms’ we show that Brotli is roughly as fast as zlib’s Deflate implementation. At the same time, it compresses slightly more densely than LZMA and bzip2 on the Canterbury corpus. The higher data density is achieved by a 2nd order context modeling, re-use of entropy codes, larger memory window of past data and joint distribution codes. Just like Zopfli, the new algorithm is named after Swiss bakery products. Brötli means ‘small bread’ in Swiss German.
brotli  zopfli  deflate  gzip  compression  algorithms  swiss  google 
september 2015 by jm
Compress data more densely with Zopfli - Google Developers Blog
New compressor from Google, gzip/zip-compatible, slower but slightly smaller results
compression  gzip  zip  deflate  google 
march 2013 by jm

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