{.experimental.} import os, strutils, threadpool if paramCount() < 1: quit() proc longCompute(n: int) = var data: int = 0 for x in 0..100: data = n * data echo $data proc main(arg: int) = parallel: for x in 0..3: spawn longCompute(arg) when isMainModule: if paramCount() < 1: quit() let arg = parseInt(paramStr(1)) main(arg)