Before going through the Forwarded Records performance issue and resolving it, we need to review the structure of the SQL Server tables.
Table Structure Overview
In SQL Server, the fundamental unit of the data storage is the 8-KB Pages. Each page starts with a 96-byte header that stores the system information about that page. Then, the table rows will be stored on the data pages serially after the header. At the end of the page, the row offset table, that contains one entry for each row, will be stored opposite to the sequence of the rows in the page. This row offset entry shows how far the first byte of that row is located from the start of the page.