Gnu Parallel

I had never heard of this til now, but it looks like it can make some tasks in Bash much simpler/faster.

From: https://en.wikipedia.org/wiki/GNU_parallel

The idea is to convert code such as:

    for x in `cat list` ; do 
        do_something "$x"
    done | process_output

Into

    cat list | parallel do_something | process_output

Another simple example someone posted on the Arch Wiki (s/printf/echo/):

    printf "world\nasynchronous processing" | parallel "echo hello, {}"

    hello, world
    hello, asynchronous processing