Get UDF execution statistics

SELECT TOP (25) DB_NAME(database_id) AS [Database Name]
	,OBJECT_NAME(object_id, database_id) AS [Function Name]
	,total_worker_time
	,execution_count
	,total_elapsed_time
	,total_elapsed_time / execution_count AS [avg_elapsed_time]
	,last_elapsed_time
	,last_execution_time
	,cached_time
	,[type_desc]
FROM sys.dm_exec_function_stats WITH (NOLOCK)
ORDER BY total_worker_time DESC
OPTION (RECOMPILE);

dm_exec_function_stats