oxipng — oxipng.exe -o 6 --libdeflater --threads 1 --alpha --strip all

file insize instate stats outsize outstate savings
sprite1.png 214138 bytes /c6 /f0 /n82
Kernel  Time =     0.203 =    3%
User    Time =     4.921 =   95%
Process Time =     5.125 =   99%    Virtual  Memory =     26 MB
Global  Time =     5.138 =  100%    Physical Memory =     29 MB
103514 bytes /c6 /f0 /n16 110624 bytes
sprite2.png 81959 bytes /c6 /f0 /n27
Kernel  Time =     0.000 =    0%
User    Time =     1.531 =  100%
Process Time =     1.531 =  100%    Virtual  Memory =     16 MB
Global  Time =     1.521 =  100%    Physical Memory =     18 MB
40392 bytes /c6 /f0 /n5 41567 bytes
sprite3.png 481998 bytes /c6 /f0 /n118
Kernel  Time =     0.578 =    8%
User    Time =     6.437 =   91%
Process Time =     7.015 =   99%    Virtual  Memory =     45 MB
Global  Time =     7.023 =  100%    Physical Memory =     45 MB
251354 bytes /c6 /f0 /n15 230644 bytes
sprite4.png 76877 bytes /c6 /f0 /n76
Kernel  Time =     0.015 =    3%
User    Time =     0.421 =   99%
Process Time =     0.437 =  103%    Virtual  Memory =     13 MB
Global  Time =     0.424 =  100%    Physical Memory =      9 MB
26148 bytes /c3 /f0 /d8 /n9 50729 bytes
sprite5.png 49557 bytes /c6 /f0 /n23
Kernel  Time =     0.000 =    0%
User    Time =     0.359 =  101%
Process Time =     0.359 =  101%    Virtual  Memory =     13 MB
Global  Time =     0.353 =  100%    Physical Memory =      9 MB
24679 bytes /c3 /f0 /d8 /n7 24878 bytes
sprite6.png 31212 bytes /c6 /f0 /n15
Kernel  Time =     0.015 =    7%
User    Time =     0.203 =   93%
Process Time =     0.218 =  100%    Virtual  Memory =     12 MB
Global  Time =     0.216 =  100%    Physical Memory =      8 MB
14857 bytes /c3 /f0 /d8 /n2 16355 bytes
sprite7.png 59637 bytes /c6 /f0 /n17
Kernel  Time =     0.031 =    2%
User    Time =     1.234 =   97%
Process Time =     1.265 =   99%    Virtual  Memory =     15 MB
Global  Time =     1.271 =  100%    Physical Memory =     13 MB
36297 bytes /c6 /f0 /n5 23340 bytes
sprite8.png 469897 bytes /c6 /f0 /n88
Kernel  Time =     0.125 =    4%
User    Time =     2.656 =   95%
Process Time =     2.781 =   99%    Virtual  Memory =     28 MB
Global  Time =     2.782 =  100%    Physical Memory =     27 MB
393076 bytes /c6 /f5 /n12 76821 bytes
sprite9.png 204177 bytes /c6 /f0 /n42
Kernel  Time =     0.015 =    4%
User    Time =     0.343 =   97%
Process Time =     0.359 =  102%    Virtual  Memory =     14 MB
Global  Time =     0.351 =  100%    Physical Memory =     13 MB
85746 bytes /c3 /f0 /d8 /n11 118431 bytes
spritea.png 163705 bytes /c6 /f0 /n112
Kernel  Time =     0.015 =    1%
User    Time =     1.421 =  101%
Process Time =     1.437 =  102%    Virtual  Memory =     19 MB
Global  Time =     1.399 =  100%    Physical Memory =     21 MB
61385 bytes /c3 /f0 /d8 /n11 102320 bytes
spriteb.png 791918 bytes /c6 /f0 /n3
Kernel  Time =     0.046 =    3%
User    Time =     1.500 =   97%
Process Time =     1.546 =  100%    Virtual  Memory =     22 MB
Global  Time =     1.543 =  100%    Physical Memory =     22 MB
416727 bytes /c6 /f0 /n35 375191 bytes
spritec.png 326840 bytes /c2 /f4 /n5
Kernel  Time =     0.015 =    4%
User    Time =     0.312 =   98%
Process Time =     0.328 =  103%    Virtual  Memory =     14 MB
Global  Time =     0.317 =  100%    Physical Memory =     13 MB
117824 bytes /c3 /f0 /d8 /n11 209016 bytes
total savings 1379916 bytes
total time 22,34 seconds