I have an ASP.NET MVC page that has JQuery Editable Datatable that has 14 columns. I have a button (Apply No Findings)to do Client side calcultions snd apply for all Rows in tha
Despite another answer already accepted I want to place here general information for developers who will have this problem in feature:
By this link you can find information how to fix this from user side http://support.microsoft.com/kb/175500 - user can add one Registry key.
Also you can find there information about when this "Running slow" message appears:
By default, the key does not exist. If the key has not been added, the default threshold limit for the time-out dialog box is 5,000,000 statements for Internet Explorer 4 and later versions.
As you see slowness measured in javascript statements, not in time.