Google 以 Apache License, Version 2.0 發表了與 zlib/deflate 相容的壓縮程式:「Compress Data More Densely with Zopfli」。
與 zlib/deflate 相容代表現有的 browser 都不需要變動,而在 project 頁面上是這樣寫:
Zopfli Compression Algorithm is a new zlib (gzip, deflate) compatible compressor. This compressor takes more time (~100x slower), but compresses around 5% better than zlib and better than any other zlib-compatible compressor we have found.
比起現有的 zlib-compatible compressor 大約慢 100 倍 (XDDD),但對於靜態內容的幫助會很大,因為壓一次後就可以用很多次。