To optimize searching when many tasks are present, you can configure the task application that contains the task to use an indexed search provider to identify specific non-list business data fields as indexed fields, rather than use the standard search.

When a task type is enabled for indexed searches/indexed business data fields, an indexed field table is created in the run-time database of the Task Engine when the task application is published to the runtime. In this case, a search considers only the indexed business data fields in the table and ignores all other fields, resulting in a much faster search.

Obviously, an indexed field search can return only the business data fields which are indexed. If a field is not indexed, a search for that field will return no results.

Task developers are advised to give careful thought as to which search scheme is implemented for a given task type.