'Start new instance' take a while to compile when I reopen my Project

Following Unreal Engine 4 Tutorial on Youtube, I set my Solution Configuration as “DebugGame Editor” which allows me to access my application only through Visual Studio by starting a new instance.
That would be ok if it wasn’t that it takes something like 15 minutes every time I close and reopen my Project.
Is there a way to build my Project in debug mode so that it’s not necessary to wait all this time?
Thank you in advance.