A better PNG minifier

over 5 years ago from Ivan Kutskir, Programmer

  • Vlad Danilov, over 5 years ago

    The 23.3 kB is 254 colors. The 20.4 kB is just 25 colors, and just 15.1 kB (-26.1%) losslessly compressed with a better tool. That's the difference.

    2 points
    • Ivan KutskirIvan Kutskir, over 5 years ago

      That is truly amazing! I guess the 15.1 kB version was made by trying different orderings of palette and different filtering options. I could do that in 6 lines of code, but this part would take too much time ...

      How long did it take? I guess it was more than 50 milliseconds.

      0 points
      • Vlad Danilov, over 5 years ago

        It is time consuming, takes seconds. You need all the performance you have.

        Type trials, palette sorting, filter brute forcing, nearly-optimal Deflate compression, etc. It's way more than 6 lines of code to do it properly.

        With bit-optimal parsing and elaborate heuristics you can probably get close and keep top performance.

        0 points