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

[glennrp at comcast.net]

----- glennrp at comcast.net wrote:
> 
> ----- Frédéric Kayser <f.kayser at free.fr> wrote:
> > Hi Glenn,
> > could you rerun it but force the filter 0 (none) this time? I'm no sure bzip2 and xz really benefit from the filters.
> 
>       Method           time   IDAT bytes
>     original files      n/a    5019516
> 
>     pngcrush -brute   310.8    4281038
>     zopfli --zlib     596.7    4035633

>     pngcrush default   24.5    4299905
>     zopfli --zlib     590.4    4047719

>     pngcrush none      18.6    5136096
>     zopfli --zlib      98.9    4864938
 
>     pngcrush adaptive  17.4    4763290
>     zopfli --zlib      99.0    5153680

I reran the tests just to make sure I hadn't
made some mistake that caused the huge disparity
in runtimes for zopfli, but it's real.  I'm
not too happy with the unpredictable runtimes.

Glenn