OptiPNG — optipng.exe -o2

file insize instate stats outsize outstate savings
brocolli.png 54836 bytes /c3 /f0 /d8 /n6
Kernel  Time =     0.031 =    9%
User    Time =     0.343 =  105%
Process Time =     0.375 =  115%    Virtual  Memory =      2 MB
Global  Time =     0.324 =  100%    Physical Memory =      6 MB
43097 bytes /c3 /f0 /d4 /n3 11739 bytes
carrot.png 61197 bytes /c3 /f0 /d8 /n17
Kernel  Time =     0.000 =    0%
User    Time =     0.734 =  100%
Process Time =     0.734 =  100%    Virtual  Memory =      3 MB
Global  Time =     0.727 =  100%    Physical Memory =      6 MB
39791 bytes /c3 /f0 /d4 /n2 21406 bytes
chart.png 63110 bytes /c3 /f0 /d8 /n29
Kernel  Time =     0.015 =    2%
User    Time =     0.578 =   96%
Process Time =     0.593 =   98%    Virtual  Memory =      4 MB
Global  Time =     0.600 =  100%    Physical Memory =      8 MB
29446 bytes /c3 /f5 /d4 /n3 33664 bytes
colors.png 5713 bytes /c3 /f0 /d8 /n4
Kernel  Time =     0.000 =    0%
User    Time =     0.062 =   88%
Process Time =     0.062 =   88%    Virtual  Memory =      3 MB
Global  Time =     0.070 =  100%    Physical Memory =      6 MB
1172 bytes /c3 /f5 /d4 /n1 4541 bytes
salad.png 244577 bytes /c3 /f0 /d8 /n19
Kernel  Time =     0.015 =    0%
User    Time =     1.812 =   97%
Process Time =     1.828 =   98%    Virtual  Memory =      4 MB
Global  Time =     1.853 =  100%    Physical Memory =      7 MB
168998 bytes /c3 /f0 /d4 /n6 75579 bytes
screen.png 9707 bytes /c3 /f0 /d8 /n32
Kernel  Time =     0.000 =    0%
User    Time =     0.156 =   96%
Process Time =     0.156 =   96%    Virtual  Memory =      3 MB
Global  Time =     0.162 =  100%    Physical Memory =      6 MB
5916 bytes /c3 /f0 /d4 /n1 3791 bytes
total savings 150720 bytes
total time 3,74 seconds