Looks great. Personally, I have been using a "cache" function to cache output of expensive commands. This has helped me iterate faster on pipelines that call into apis.

  function cache {
      cmd="$*"
      name=$(echo "$cmd" | base64)
      if [[ -f ./cache/$name.exit ]] && [[ $(cat ./cache/$name.exit) -eq 0 ]]; then
          echo "cached"
      else
          mkdir -p ./cache
          eval "$cmd" > ./cache/$name.out
          echo $? > ./cache/$name.exit
      fi
      cat ./cache/$name.out
  }

  cache ls /