There are indeed memory leaks in SQL 2012 SP1+. I don't know that your dev box would be open to them tho.
Did you set the max memory for SQL Server? That is a MANDATORY setting. Also, I would consider bouncing the ssis service just in case that wound up eating too much memory.
And what else is running on the box?
Kevin G. Boles
SQL Server Consultant
SQL MVP 2007-2012
TheSQLGuru at GMail