execute a command in parallel

rip.sh

#!/bin/env bash

rip() {
  local cmd=$1 # Target command
  local max_proc=$(($(nproc) / 2))
  mapfile -t args < <(printf '%s\n' "${@:2}")
  printf '%s\n' "${args[@]}" | xargs --verbose -I % -P $max_proc bash -c "${cmd} %"
}

# Example usage

mapfile -t rpms < <(find "$HOME/src" -name '*.rpm')
rip echo "${rpms[@]}"