I think it is unsafe to parallelize grep with xargs as in done in the article, because, beyond delivery order shuffling, the output of the parallel greps could

I think it is unsafe to parallelize grep with xargs as in done in the article, because, beyond delivery order shuffling, the output of the parallel greps could get mixed up (the beginning of a line is by one grep and the end of a line is from a different grep, so, reading line by line afterwards, you get garbled lines). See https://www.gnu.org/software/parallel/man.html#DIFFERENCES-BETWEEN-xargs-AND-GNU-Parallel https://www.gnu.org/software/parallel/man.html#DIFFERENCES-B...