N-gram query prompts user with "kill page" box because the tab is unresponsive

[alexandermorgan]

When running a 3-gram querry on two midi files (both Victoria Magnificat in Quinti Toni files) in chrome, the browser prompted me with an option to kill the page as I waited for the results because the tab was "unresponsive". When I chose the "wait" option the graph consistently displayed after several seconds time.
Is there a way to convey to browsers that the web app is still working to keep this prompt from getting to the user?

[alexandermorgan]

This happens with the table and the graph formats.