Lossless recommendations comparison 2021-09-27

g0 =   cjxl -d 0 -e 9 -E 3 -I 1 -g 0
g1 =   cjxl -d 0 -e 9 -E 3 -I 1 -g 1
g2 =   cjxl -d 0 -e 9 -E 3 -I 1 -g 2
g3 =   cjxl -d 0 -e 9 -E 3 -I 1 -g 3
P0 =   cjxl -d 0 -e 9 -I 0 -P 0 -g 3 --patches 0
P4 =   cjxl -d 0 -e 9 -I 0 -P 4 -g 3 --patches 0
WebP = cwebp -z 9 -metadata all
PNG =  pingo -s9 -nostrip

cjxl v0.6.0 0.6~alpha20210820161555-0+gite00ac57
cwebp v1.2.0
pingo v0.99

Total images    222
2D art           42
3D art           18
comic/manga      16
generated         8
graphic          11
misc             11
mixed            23
photo            49
pixel art        23
reduced palette   4
text             17

encoder   mean bpp  savings  wins
g0           3.559   31.19%     9
g1           3.475   32.81%    19
g2           3.451   33.28%    59
g3           3.577   30.86%   105
P0           6.302  -21.83%    19
P4           5.469   -5.72%     0
WebP         4.025   22.18%    20
PNG          5.173    0.00%     1
g2/PNG       3.444   33.43%    60
g3/PNG       3.569   31.01%   106
g2/P0/PNG    3.435   33.60%    79
g3/P0/PNG    3.562   31.15%   125
g2/WebP/PNG  3.421   33.87%    80
g3/WebP/PNG  3.531   31.73%   126
g2/g3/PNG    3.427   33.76%   159
smallest     3.386   34.55%   222

[5:14 AM] _wb_: what does g2/PNG mean? smallest of g2 and PNG?

[2:49 PM] veluca: good to know that -I 0 -P 4 is never useful...