If you have a multiprocessor system (several processors/cores sharing the same memory/address space) you can use the solution suggested in the other posts.
If you have SSH access to other machines, then you can evenly distribute the execution of the backticks among the machines using the parallel backtick qx method provided by GRID::Cluster.

In reply to Re: running multiple system commands in parallel by casiano
in thread running multiple system commands in parallel by incognito129

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