谷歌近日推出了全新開源壓縮演算法Zopfli, 官方主頁在 這裡，相關文件在 這裡

Zopfli is a new deflate compatible compressor that was inspired by compression improvements
developed originally for the lossless mode of WebP image compression. Being compatible with
deflate makes Zopfli compatible with zlib and gzip. Most internet browsers support deflate
decompression, and it has a wide range of other applications. This means that Zopflicompatible
decompression is readily widely available.

二個特點：
1. The output produced by Zopfli is 3.7–8.3 % smaller than that of gzip 9.
2. Zopfli is 81 times slower than the fastest measured algorithm gzip 9.

最大的特點是壓縮好的資料和zip相容，也就是說目前標準的zip uncompress演算法都能解開，看起來比較適合web伺服器的資料儲存，降低成本，雖然只有3-8%點的提高，但是資料規模大了，還是很可觀的。

下載原始碼，編譯得到zopfli：

$ ./zopfli  -h
Usage: zopfli [OPTION]... FILE
  -h    gives this help
  -c    write the result on standard output, instead of disk filename + '.gz'
  -v    verbose mode
  --gzip  output to gzip format (default)
  --deflate  output to deflate format instead of gzip
  --zlib  output to zlib format instead of gzip
  --i5  less compression, but faster
  --i10  less compression, but faster
  --i15  default compression, 15 iterations
  --i25  more compression, but slower
  --i50  more compression, but slower
  --i100  more compression, but slower
  --i250  more compression, but slower
  --i500  more compression, but slower
  --i1000  more compression, but slower

祝玩得開心。

Post Footer automatically generated by wp-posturl plugin for wordpress.