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A better PNG minifier

over 5 years ago from Ivan Kutskir, Programmer

  • Ivan KutskirIvan Kutskir, over 5 years ago

    Just because some project is more complex, does not mean it works better. I also don't understand what does it have to do with browsers.

    Your bunny.png is 23.3 kB. My bunny.png https://imgur.com/a/XGaTX from UPNG.js is 20.4 kB and I doubt you can see any difference.

    0 points
    • 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