Saving file 'out.webp'
File:      in.png
Dimension: 900 x 600
Output:    15236 bytes Y-U-V-All-PSNR 36.62 41.56 42.21   37.77 dB
           (0.23 bpp)

JPG CVVDP= 9.00 Fsize= 30.8 KB [ cjpeg -baseline -sample 1x1,1x1,1x1 -quality 22 ]

Webp CVVDP= 9.00 Fsize= 14.9 KB [ cwebp -m 6 -af -q 30 ]

JXL CVVDP= 9.00 Fsize= 16.4 KB [ cjxl -e 10 -q 30 ]

AVIF CVVDP= 9.01 Fsize= 8.8 KB [ avifenc -y 420 -d 10 -s 0 -q 30]


WebP compression efficiency relative to [ JXL:  110.4 % ] & [ AVIF: 72.3 % ]