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

file insize instate stats outsize outstate savings
screenshot.png 37950 bytes /c2 /f0 /n131
Kernel  Time =     0.000 =    0%
User    Time =     0.421 =  153%
Process Time =     0.421 =  153%    Virtual  Memory =     26 MB
Global  Time =     0.274 =  100%    Physical Memory =     20 MB
27873 bytes /c2 /f0 /n14 10077 bytes
screenshot_90.png 95130 bytes /c2 /f0 /n136
Kernel  Time =     0.015 =    5%
User    Time =     0.406 =  137%
Process Time =     0.421 =  143%    Virtual  Memory =     25 MB
Global  Time =     0.294 =  100%    Physical Memory =     17 MB
80635 bytes /c2 /f5 /n25 14495 bytes
screenshot_gradient.png 243541 bytes /c2 /f0 /n179
Kernel  Time =     0.000 =    0%
User    Time =     0.515 =  163%
Process Time =     0.515 =  163%    Virtual  Memory =     27 MB
Global  Time =     0.314 =  100%    Physical Memory =     21 MB
32085 bytes /c2 /f5 /n14 211456 bytes
screenshot_jpg.png 897954 bytes /c2 /f5 /n148
Kernel  Time =     0.000 =    0%
User    Time =     0.921 =  178%
Process Time =     0.921 =  178%    Virtual  Memory =     31 MB
Global  Time =     0.516 =  100%    Physical Memory =     20 MB
792798 bytes /c2 /f0 /n125 105156 bytes
screenshot_lorem.png 156719 bytes /c2 /f0 /n147
Kernel  Time =     0.000 =    0%
User    Time =     0.859 =  182%
Process Time =     0.859 =  182%    Virtual  Memory =     27 MB
Global  Time =     0.472 =  100%    Physical Memory =     20 MB
123571 bytes /c2 /f0 /n36 33148 bytes
screenshot_noise.png 590182 bytes /c2 /f0 /n170
Kernel  Time =     0.031 =    2%
User    Time =     2.250 =  175%
Process Time =     2.281 =  178%    Virtual  Memory =     29 MB
Global  Time =     1.278 =  100%    Physical Memory =     30 MB
423893 bytes /c2 /f0 /n52 166289 bytes
screenshot_pal.png 34862 bytes /c2 /f0 /n131
Kernel  Time =     0.000 =    0%
User    Time =     0.343 =  181%
Process Time =     0.343 =  181%    Virtual  Memory =     24 MB
Global  Time =     0.189 =  100%    Physical Memory =     14 MB
16791 bytes /c3 /f0 /d8 /n7 18071 bytes
screenshot_pics.png 700836 bytes /c2 /f0 /n169
Kernel  Time =     0.015 =    3%
User    Time =     0.734 =  149%
Process Time =     0.750 =  152%    Virtual  Memory =     29 MB
Global  Time =     0.491 =  100%    Physical Memory =     24 MB
505460 bytes /c2 /f5 /n23 195376 bytes
screenshot_webp.png 257269 bytes /c2 /f5 /n33
Kernel  Time =     0.000 =    0%
User    Time =     0.796 =  158%
Process Time =     0.796 =  158%    Virtual  Memory =     27 MB
Global  Time =     0.504 =  100%    Physical Memory =     20 MB
216924 bytes /c2 /f5 /n44 40345 bytes
total savings 794413 bytes
total time 4,33 seconds