I have a script that does some complex math and parsing. I need to be able to tell how long it took to do it's work. This should be relatively simple: just get a timestamp before I call the sub that does the work, then get another after, and use Date::Manip or Date::Calc to figure out the difference between the two. However, I'm in a situation where I am strictly not allowed to use any external modules. Is there a perlish way to accomplish this without using any modules? I thought perhaps someone had run into this before and could point me to a recipe...