Optimize image

[romulojales]

PageSpeed and smushit still detecting the sprite is not optimized enough.

Image 1
The sprite was generated with optimize arg True. It's have 40.8kb
http://s.glbimg.com/es/ge/f/mosaico/mosaico/1/201309031416/sprite.png

Image 2
And this one was generated with optimize arg False, 41.2kb.
http://s.glbimg.com/es/ge/f/mosaico/mosaico/1/201309031418/sprite.png

When I analyze the above images at pagespeed:

Image 1 can be 3.6kb off and Image 2 4.1kb

At smushit: Image 1: 4.01kb Image 2: 4.45kb

These numbers represents around 10% of each image.

We need improve the compression rate!

[romulojales]

Maybe change to libpng... Pillow doesn't compresses as well