@amszmidt yes, this is an option too. But sem is a bit different, it is especially useful when you have some script already, but you need to add a pitch of parallelism into :)

New day, new #shell tool finding.
I was using GNU parallel before to run some simple scripts in parallel. But found out another tool from the same package: sem - semaphore for executing shell command lines in parallel.

This is a simple example:
```
for url in $urls; do
sem -j 16 curl -O "$url"
done
sem --wait
```

Run curl in 16 parallel jobs. How cool is that!