[Zlib-devel] Google's version of zlib code

Gilles Vollant info at winimage.com
Sat Mar 2 11:12:42 EST 2013


How it compare with deflate compressor of 7zip ?

-----Message d'origine-----
De : Zlib-devel [mailto:zlib-devel-bounces at madler.net] De la part de Nelson
H. F. Beebe
Envoyé : samedi 2 mars 2013 16:55
À : zlib-devel at madler.net
Cc : beebe at math.utah.edu
Objet : [Zlib-devel] Google's version of zlib code

This story appeared yesterday:

	Google publishes Zopfli as open-source compression algorithm to
speed up Web download
	Compression is about 100 times slower than conventional methods but
compresses about 5% better, Google said
	
http://www.computerworld.com/s/article/9237264/Google_publishes_Zopfli_as_op
en_source_compression_algorithm_to_speed_up_Web_downloads

	https://code.google.com/p/zopfli/

It looks like they are hammering the CPU by 100x to get 5% to 8% better
compression, which is unlikely to be a problem for Google with its huge CPU
count.  The article claims:

>>  Zopfli is compatible with Zip, PNG, gzip and HTTP requests among others,
...

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