These days I favour lossless WEBP instead of PNG. I often save around 30%~40% of file size compared to PNG, especially when the PNG is encoded with lots of bits per pixel (i.e 48 bits or 24 bits).
I think that’s why they were advocating for gzip or bzip2 instead of just relying on PNG’s built-in compression.
I think that’s why they were advocating for gzip or bzip2 instead of just relying on PNG’s built-in compression.