oxipng — oxipng.exe -o 2 --libdeflater --threads 1 --alpha --strip all

file insize instate stats outsize outstate savings
screenshot.png 37950 bytes /c2 /f0 /n131
Kernel  Time =     0.015 =    3%
User    Time =     0.421 =   95%
Process Time =     0.437 =   99%    Virtual  Memory =     17 MB
Global  Time =     0.441 =  100%    Physical Memory =     16 MB
27873 bytes /c2 /f0 /n14 10077 bytes
screenshot_90.png 95130 bytes /c2 /f0 /n136
Kernel  Time =     0.015 =    4%
User    Time =     0.359 =   94%
Process Time =     0.375 =   98%    Virtual  Memory =     16 MB
Global  Time =     0.379 =  100%    Physical Memory =     15 MB
80635 bytes /c2 /f5 /n25 14495 bytes
screenshot_gradient.png 243541 bytes /c2 /f0 /n179
Kernel  Time =     0.031 =    6%
User    Time =     0.468 =   93%
Process Time =     0.500 =   99%    Virtual  Memory =     19 MB
Global  Time =     0.501 =  100%    Physical Memory =     17 MB
32085 bytes /c2 /f5 /n14 211456 bytes
screenshot_jpg.png 897954 bytes /c2 /f5 /n148
Kernel  Time =     0.015 =    1%
User    Time =     0.812 =   98%
Process Time =     0.828 =  100%    Virtual  Memory =     22 MB
Global  Time =     0.827 =  100%    Physical Memory =     18 MB
792798 bytes /c2 /f0 /n125 105156 bytes
screenshot_lorem.png 156719 bytes /c2 /f0 /n147
Kernel  Time =     0.015 =    1%
User    Time =     0.812 =   97%
Process Time =     0.828 =   99%    Virtual  Memory =     18 MB
Global  Time =     0.831 =  100%    Physical Memory =     16 MB
123571 bytes /c2 /f0 /n36 33148 bytes
screenshot_noise.png 590182 bytes /c2 /f0 /n170
Kernel  Time =     0.015 =    0%
User    Time =     2.218 =   99%
Process Time =     2.234 =  100%    Virtual  Memory =     20 MB
Global  Time =     2.228 =  100%    Physical Memory =     23 MB
423893 bytes /c2 /f0 /n52 166289 bytes
screenshot_pal.png 34862 bytes /c2 /f0 /n131
Kernel  Time =     0.000 =    0%
User    Time =     0.312 =  107%
Process Time =     0.312 =  107%    Virtual  Memory =     15 MB
Global  Time =     0.289 =  100%    Physical Memory =     12 MB
16791 bytes /c3 /f0 /d8 /n7 18071 bytes
screenshot_pics.png 700836 bytes /c2 /f0 /n169
Kernel  Time =     0.015 =    2%
User    Time =     0.687 =   98%
Process Time =     0.703 =  100%    Virtual  Memory =     20 MB
Global  Time =     0.701 =  100%    Physical Memory =     20 MB
505460 bytes /c2 /f5 /n23 195376 bytes
screenshot_webp.png 257269 bytes /c2 /f5 /n33
Kernel  Time =     0.000 =    0%
User    Time =     0.734 =   99%
Process Time =     0.734 =   99%    Virtual  Memory =     18 MB
Global  Time =     0.741 =  100%    Physical Memory =     16 MB
216924 bytes /c2 /f5 /n44 40345 bytes
total savings 794413 bytes
total time 6,94 seconds