Page Free Space On Heaps
Raul Gonzalez shows a case in which writing to a heap can be more efficient than writing to a clustered index:
Lots have been written, including myself, about the advantage and disadvantages of the different types of tables that exist in SQL Server, Clustered and Heaps.
Today I will again, because at the end of the day, a table is the most basic structure in a database and we need them to store the data, which is indeed the purpose of having a database, right?
Interesting reading. Check it out.