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

file insize instate stats outsize outstate savings
air.png 1524850 bytes /c2 /f4 /n10
Kernel  Time =     0.031 =    3%
User    Time =     1.421 =  151%
Process Time =     1.453 =  155%    Virtual  Memory =     36 MB
Global  Time =     0.936 =  100%    Physical Memory =     36 MB
1330926 bytes /c2 /f5 /n158 193924 bytes
bridge.png 1762214 bytes /c2 /f4 /n9
Kernel  Time =     0.031 =    3%
User    Time =     1.343 =  143%
Process Time =     1.375 =  146%    Virtual  Memory =     39 MB
Global  Time =     0.935 =  100%    Physical Memory =     26 MB
1522202 bytes /c2 /f5 /n184 240012 bytes
citroen.png 1936514 bytes /c2 /f4 /n14
Kernel  Time =     0.015 =    2%
User    Time =     0.890 =  156%
Process Time =     0.906 =  159%    Virtual  Memory =     39 MB
Global  Time =     0.569 =  100%    Physical Memory =     31 MB
1798470 bytes /c2 /f5 /n46 138044 bytes
correfocs.png 1936225 bytes /c2 /f4 /n12
Kernel  Time =     0.015 =    1%
User    Time =     1.250 =  144%
Process Time =     1.265 =  146%    Virtual  Memory =     40 MB
Global  Time =     0.863 =  100%    Physical Memory =     34 MB
1684914 bytes /c2 /f5 /n77 251311 bytes
dune.png 2251285 bytes /c2 /f4 /n9
Kernel  Time =     0.015 =    2%
User    Time =     0.921 =  151%
Process Time =     0.937 =  154%    Virtual  Memory =     42 MB
Global  Time =     0.607 =  100%    Physical Memory =     35 MB
2010239 bytes /c2 /f5 /n20 241046 bytes
eaglefairy.png 2167502 bytes /c2 /f4 /n5
Kernel  Time =     0.000 =    0%
User    Time =     1.093 =  151%
Process Time =     1.093 =  151%    Virtual  Memory =     42 MB
Global  Time =     0.719 =  100%    Physical Memory =     31 MB
1880015 bytes /c2 /f5 /n166 287487 bytes
irargerich.png 2066635 bytes /c2 /f4 /n15
Kernel  Time =     0.000 =    0%
User    Time =     1.234 =  149%
Process Time =     1.234 =  149%    Virtual  Memory =     41 MB
Global  Time =     0.824 =  100%    Physical Memory =     38 MB
1842747 bytes /c2 /f5 /n100 223888 bytes
kavica.png 1863164 bytes /c2 /f4 /n8
Kernel  Time =     0.031 =    6%
User    Time =     0.750 =  151%
Process Time =     0.781 =  157%    Virtual  Memory =     38 MB
Global  Time =     0.494 =  100%    Physical Memory =     28 MB
1725371 bytes /c2 /f5 /n83 137793 bytes
mercado.png 2257065 bytes /c2 /f4 /n9
Kernel  Time =     0.031 =    5%
User    Time =     0.781 =  146%
Process Time =     0.812 =  152%    Virtual  Memory =     41 MB
Global  Time =     0.532 =  100%    Physical Memory =     32 MB
2120754 bytes /c2 /f5 /n26 136311 bytes
panthera.png 1795149 bytes /c2 /f4 /n14
Kernel  Time =     0.015 =    1%
User    Time =     1.437 =  146%
Process Time =     1.453 =  148%    Virtual  Memory =     39 MB
Global  Time =     0.979 =  100%    Physical Memory =     33 MB
1563348 bytes /c2 /f5 /n160 231801 bytes
park.png 1925839 bytes /c2 /f4 /n11
Kernel  Time =     0.015 =    2%
User    Time =     0.859 =  151%
Process Time =     0.875 =  154%    Virtual  Memory =     38 MB
Global  Time =     0.567 =  100%    Physical Memory =     32 MB
1824104 bytes /c2 /f5 /n42 101735 bytes
source.png 2123295 bytes /c2 /f4 /n14
Kernel  Time =     0.031 =    6%
User    Time =     0.781 =  154%
Process Time =     0.812 =  160%    Virtual  Memory =     39 MB
Global  Time =     0.504 =  100%    Physical Memory =     31 MB
2005677 bytes /c2 /f5 /n32 117618 bytes
swallowtail.png 2041337 bytes /c2 /f4 /n10
Kernel  Time =     0.000 =    0%
User    Time =     1.218 =  150%
Process Time =     1.218 =  150%    Virtual  Memory =     41 MB
Global  Time =     0.808 =  100%    Physical Memory =     33 MB
1831224 bytes /c2 /f5 /n135 210113 bytes
tivoli.png 2240511 bytes /c2 /f4 /n8
Kernel  Time =     0.046 =    8%
User    Time =     0.843 =  146%
Process Time =     0.890 =  154%    Virtual  Memory =     41 MB
Global  Time =     0.575 =  100%    Physical Memory =     30 MB
2112022 bytes /c2 /f5 /n59 128489 bytes
total savings 2639572 bytes
total time 9,91 seconds