This test runs and profiles a simple looped computation.
    
    
    TEST
    
      - load file in the browser;
      
- open DevTools with console (Ctrl+Shift+I on Win/Linux, Command+Option+I on Mac);
      
- go to 'Profiles' page;
      
- observe that 'Profile 1' item has appeared under 'CPU profiles' section;
      
- reload page in browser;
      
- observe that after 5 seconds, 'Profile 2' item has appeared under
        'CPU profiles' section;
      
- take a couple of heap snapshots by pressing 'Take heap snapshot.'
        button (eye icon on the left of the status bar);
      
- close DevTools window;
      
- re-open DevTools window;
      
- go to 'Profiles' page;
      
- verify that CPU profiles 'Profile 1' and 'Profile 2', and heap profiles
        taken previously are restored back (Warning: it may take some
        time to re-process them).