This test runs a simple looped computation to test basic functionality of profile view grid.
To use this test:

- load file in the browser;
- open DevTools (Ctrl+Shift+I on Win/Linux, Command+Option+I on Mac);
- go to 'Profiles' page;
- press 'Start profiling' button (gray dot on the left side of status bar);
- wait for 5 seconds;
- press 'Stop profiling' button (red dot on the left side of status bar);

On the left pane under 'CPU profiles' section, an item called 'Profile 1' must appear, and a grid with profile data must appear on the right. Now test the following functionality in the grid:

- change sorting order in each column by clicking on its header;
- resize each column;
- toggle between showing absolute times and percents (button with percent sign on the status bar);
- double-click on numbers in 'Self' and 'Total' columns to toggle between times and percents for this column only;
- expanding and collapsing tree nodes;
- toggling between "Heavy" and "Tree" views.