I’ve been trying to be a good citizen and post more in the SQL Server section of the MSDN forums, and so I came across a question in the SQL Server > SSIS section about start-up performance that made me realize not a lot of people are aware of how a package initially executes.
Since Kirk Haselden was my original source for some of this information so I will point to his post, Caching in The SSIS Service, for anyone to reference.