oxipng — oxipng.exe -o 2 --libdeflater --alpha --strip all

file insize instate stats outsize outstate savings
sprite1.png 214138 bytes /c6 /f0 /n82
Kernel  Time =     0.234 =   17%
User    Time =     2.531 =  193%
Process Time =     2.765 =  211%    Virtual  Memory =     32 MB
Global  Time =     1.307 =  100%    Physical Memory =     28 MB
103514 bytes /c6 /f0 /n16 110624 bytes
sprite2.png 81959 bytes /c6 /f0 /n27
Kernel  Time =     0.015 =    4%
User    Time =     0.796 =  254%
Process Time =     0.812 =  259%    Virtual  Memory =     23 MB
Global  Time =     0.313 =  100%    Physical Memory =     20 MB
40392 bytes /c6 /f0 /n5 41567 bytes
sprite3.png 481998 bytes /c6 /f0 /n118
Kernel  Time =     0.656 =   31%
User    Time =     3.515 =  171%
Process Time =     4.171 =  203%    Virtual  Memory =     65 MB
Global  Time =     2.052 =  100%    Physical Memory =     52 MB
251354 bytes /c6 /f0 /n15 230644 bytes
sprite4.png 76877 bytes /c6 /f0 /n76
Kernel  Time =     0.015 =   14%
User    Time =     0.187 =  179%
Process Time =     0.203 =  194%    Virtual  Memory =     22 MB
Global  Time =     0.104 =  100%    Physical Memory =     10 MB
26148 bytes /c3 /f0 /d8 /n9 50729 bytes
sprite5.png 49557 bytes /c6 /f0 /n23
Kernel  Time =     0.000 =    0%
User    Time =     0.156 =  183%
Process Time =     0.156 =  183%    Virtual  Memory =     21 MB
Global  Time =     0.085 =  100%    Physical Memory =     10 MB
24679 bytes /c3 /f0 /d8 /n7 24878 bytes
sprite6.png 31212 bytes /c6 /f0 /n15
Kernel  Time =     0.000 =    0%
User    Time =     0.093 =  149%
Process Time =     0.093 =  149%    Virtual  Memory =     20 MB
Global  Time =     0.062 =  100%    Physical Memory =     10 MB
14857 bytes /c3 /f0 /d8 /n2 16355 bytes
sprite7.png 59637 bytes /c6 /f0 /n17
Kernel  Time =     0.000 =    0%
User    Time =     0.640 =  234%
Process Time =     0.640 =  234%    Virtual  Memory =     23 MB
Global  Time =     0.272 =  100%    Physical Memory =     15 MB
36297 bytes /c6 /f0 /n5 23340 bytes
sprite8.png 469897 bytes /c6 /f0 /n88
Kernel  Time =     0.109 =   15%
User    Time =     1.546 =  223%
Process Time =     1.656 =  239%    Virtual  Memory =     35 MB
Global  Time =     0.692 =  100%    Physical Memory =     32 MB
393076 bytes /c6 /f5 /n12 76821 bytes
sprite9.png 204177 bytes /c6 /f0 /n42
Kernel  Time =     0.015 =   14%
User    Time =     0.203 =  191%
Process Time =     0.218 =  206%    Virtual  Memory =     23 MB
Global  Time =     0.105 =  100%    Physical Memory =     13 MB
85746 bytes /c3 /f0 /d8 /n11 118431 bytes
spritea.png 163705 bytes /c6 /f0 /n112
Kernel  Time =     0.000 =    0%
User    Time =     0.656 =  193%
Process Time =     0.656 =  193%    Virtual  Memory =     26 MB
Global  Time =     0.339 =  100%    Physical Memory =     20 MB
61385 bytes /c3 /f0 /d8 /n11 102320 bytes
spriteb.png 791918 bytes /c6 /f0 /n3
Kernel  Time =     0.000 =    0%
User    Time =     1.000 =  311%
Process Time =     1.000 =  311%    Virtual  Memory =     28 MB
Global  Time =     0.321 =  100%    Physical Memory =     27 MB
416727 bytes /c6 /f0 /n35 375191 bytes
spritec.png 326840 bytes /c2 /f4 /n5
Kernel  Time =     0.031 =   31%
User    Time =     0.171 =  171%
Process Time =     0.203 =  203%    Virtual  Memory =     22 MB
Global  Time =     0.099 =  100%    Physical Memory =     12 MB
117824 bytes /c3 /f0 /d8 /n11 209016 bytes
total savings 1379916 bytes
total time 5,75 seconds