Can the new PNG assets be run through zopflipng? This will swap out the gzip compression for a gzip compatible stream, but in my experience it shrinks the images by about 9% with no loss in quality and no measurable increase in decoding time (since it decodes with the standard libraries).
It does trim optional metadata, which might require some tweaking...
https://koji.fedoraproject.org/koji/packageinfo?packageID=16157 https://github.com/google/zopfli/blob/master/README.zopflipng
Quick test with both pngquant and zopflipng:
pngquant
zopflipng
5598 centos-logos/pixmaps/fedora-logo-sprite.png-pngquant-normal.png 6740 centos-logos/pixmaps/fedora-logo-sprite.png-zopflipng-more.png 6745 centos-logos/pixmaps/fedora-logo-sprite.png-zopflipng-normal.png 10262 centos-logos/pixmaps/fedora-logo-sprite.png
It seems pngquant is providing more bits of compression than zopflipng, but I need to make more tests.
Metadata Update from @areguera: - Issue assigned to areguera
Neat! I was unaware of pngquant
Metadata Update from @areguera: - Issue status updated to: Closed (was: Open)
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