Jokes aside, timing out would be useful.
A Firebug like prompt is the plan i.e. "Script is taking too long to finish, do you want to stop it..." maybe every (n * X) time interval for n is every time the msg is shown for a specific peace of code.
A Firebug like prompt is the plan i.e. "Script is taking too long to finish, do you want to stop it..." maybe every (n * X) time interval for n is every time the msg is shown for a specific peace of code.