OptiPNG — optipng.exe -o7

file insize instate stats outsize outstate savings
screenshot.png 37950 bytes /c2 /f0 /n131
Kernel  Time =     0.015 =    0%
User    Time =     6.187 =   97%
Process Time =     6.203 =   98%    Virtual  Memory =      4 MB
Global  Time =     6.327 =  100%    Physical Memory =      8 MB
28648 bytes /c2 /f0 /n2 9302 bytes
screenshot_90.png 95130 bytes /c2 /f0 /n136
Kernel  Time =     0.015 =    0%
User    Time =     6.218 =   99%
Process Time =     6.234 =   99%    Virtual  Memory =      4 MB
Global  Time =     6.276 =  100%    Physical Memory =      7 MB
83762 bytes /c2 /f5 /n4 11368 bytes
screenshot_gradient.png 243541 bytes /c2 /f0 /n179
Kernel  Time =     0.046 =    0%
User    Time =     6.796 =   98%
Process Time =     6.843 =   99%    Virtual  Memory =      4 MB
Global  Time =     6.904 =  100%    Physical Memory =      8 MB
33789 bytes /c2 /f5 /n2 209752 bytes
screenshot_jpg.png 897954 bytes /c2 /f5 /n148
Kernel  Time =     0.062 =    0%
User    Time =    35.656 =   99%
Process Time =    35.718 =   99%    Virtual  Memory =      4 MB
Global  Time =    35.841 =  100%    Physical Memory =      8 MB
829878 bytes /c2 /f0 /n36 68076 bytes
screenshot_lorem.png 156719 bytes /c2 /f0 /n147
Kernel  Time =     0.000 =    0%
User    Time =     9.890 =   99%
Process Time =     9.890 =   99%    Virtual  Memory =      4 MB
Global  Time =     9.923 =  100%    Physical Memory =      8 MB
128358 bytes /c2 /f0 /n5 28361 bytes
screenshot_noise.png 590182 bytes /c2 /f0 /n170
Kernel  Time =     0.125 =    0%
User    Time =   219.359 =   99%
Process Time =   219.484 =   99%    Virtual  Memory =      4 MB
Global  Time =   221.100 =  100%    Physical Memory =      8 MB
465905 bytes /c2 /f1 /n16 124277 bytes
screenshot_pal.png 34862 bytes /c2 /f0 /n131
Kernel  Time =     0.015 =    0%
User    Time =     3.406 =   95%
Process Time =     3.421 =   96%    Virtual  Memory =      4 MB
Global  Time =     3.562 =  100%    Physical Memory =      8 MB
17331 bytes /c3 /f0 /d8 /n1 17531 bytes
screenshot_pics.png 700836 bytes /c2 /f0 /n169
Kernel  Time =     0.031 =    0%
User    Time =    32.250 =   98%
Process Time =    32.281 =   98%    Virtual  Memory =      4 MB
Global  Time =    32.617 =  100%    Physical Memory =      8 MB
514367 bytes /c2 /f5 /n17 186469 bytes
screenshot_webp.png 257269 bytes /c2 /f5 /n33
Kernel  Time =     0.078 =    0%
User    Time =    17.984 =   99%
Process Time =    18.062 =   99%    Virtual  Memory =      4 MB
Global  Time =    18.111 =  100%    Physical Memory =      8 MB
234099 bytes /c2 /f5 /n14 23170 bytes
total savings 678306 bytes
total time 340,66 seconds