3 ms·

How about doing something with imagemagick or mencoder? I think video encoding/decoding gives a nice balance between disk and cpu usage.

• eschulte 16y ago
  Here's an imagemagick example; over six minutes with xargs, under 20 seconds with parallel $ ls *.png |wc -l 3580 $ time ls|sed 's/\(.*\)\..*/\1/'|parallel convert {}.png {}.ppm ls --color 0.00s user 0.01s system 63% cpu 0.016 total sed 's/\(.*\)\..*/\1/' 0.01s user 0.00s system 39% cpu 0.025 total parallel convert {}.png {}.ppm 97.39s user 61.87s system 890% cpu 17.883 total $ time ls|sed 's/\(.*\)\..*/\1/'|xargs -I {} convert {}.png {}.ppm ls --color 0.01s user 0.00s system 63% cpu 0.016 total sed 's/\(.*\)\..*/\1/' 0.01s user 0.00s system 39% cpu 0.025 total xargs -I {} convert {}.png {}.ppm 93.08s user 47.88s system 38% cpu 6:10.88 total