When I have the AWS Toolkit installed, it takes a long time for Visual Studio (2015 update 2) to open.
Why? Because (as I saw using Fiddler) it's posting to 169.254.169.254/latest/dynamic/instance-identity/document like 9 times, and timing out every time. I found this article which explains what that's all about.
But how do I turn it off? I really don't want to wait for so long for Visual Studio to load every time I open it.