gistfile1.txt

# Simulate two slowly-running batch jobs:

slow() {
    # print stdout at 10bps
    pv -qL 10
}
timestamp() {
  # prefix stdin with a sortable timestamp
  tai64n
}

seq 99 | slow | timestamp > seq.1 &
seq 100 199 | slow | timestamp > seq.2 &

# I'd like to see the combined output of those two logs, in timestamp-sorted order
# This gets the job done, but waits till both jobs have stopped:
sort -sm seq.1 seq.2