title: Possible to launch multiple threads of commands in cmd?
body: <p>I have about 290 files that I need to optimize in a short period of time.</p>
  
  <p>When I do <code>optipng *.png</code> it takes about 10 minutes to complete the transaction.</p>
  
  <p>However when I do <code>optipng a*.png</code> and <code>optipng m*.png</code> in two separate command line it gets the work done in 5 minutes.</p>
  
  <p>Now is there a way I can launch about 20 processes at the same time which will get the work done faster and not take up all of the space on my Desktop?</p>