Make it possible to not stop a stopwatch but read out the current time process #10175
Description
If you look onto a real (physical) stopwatch you can read out the current passed time easy wiithout having the stop it.
The kind of obvious method would be $stopwatch->getDuration($name)
Related issue: https://drupal.org/node/1936640