The following is a demonstration of the allslow DTrace script. It slows
down all processes on the system to about a tenth of their usual speed.

Here we run allslow,

   # allslow
   allslow running...
   ^C
   Wasted CPU time 90%

When allslow is running, it will be slowing down all of your processes.
When you are finished running allslow, hit Ctrl-C - it will print the
achieved wasted CPU time percent, which should be around 90%.


The following demonstrates the performance impact of running a test program
before and after running allslow,

   $ ptime ./test.pl
   
   real        0.766
   user        0.753
   sys         0.009

   $ ptime ./test.pl
   
   real        8.579
   user        8.306
   sys         0.105

test.pl normally takes 0.766 seconds to complete, but with allslow running
it takes 8.579 seconds. Wow! We have increased the time test.pl takes by
over 1000%.