Comment by jeffbee

This is a solid two times slower than `rush` in my test case. Which is along the lines of this:

  echo 0* | rush -n 100 -j 32 -D ' ' -J ' ' -- jq -rf my_program.jq {}

Although to adapt to your style I did this instead:

  ls 0* | frun -- jq -rf my_program.jq

In a directory containing 14k data files. I think your reference should be rush, not a Perl script.