在第一次应用程序启动时打开与SQL Server的连接太慢

In my WPF4 desktop application I'm using connection to SQL Server 2008 R2 via ADO.NET Entity Data Model (edmx) and I payed attention, that when I start application for the first time (cold start) it takes too long time (about 10 sec) until application establish (open) connection to DB and could perform basic LINQ-query (no join, table is really small) and show result in DataGrid control.In my WPF4 desktop application I'm using connec