I last shared this on Google+ two years ago. It was time to
  share it again How long is a billionth of a second? 11.8 inches
  long.

  (that's a nanosecond)

  How long is a microsecond?

  984 feet long.

  So if you are ever doing programming and you are wasting
  microseconds (ms) - you'll know just how much you're wasting.

  These aren't theoretical - this is reality. And it's pretty
  cool.