Microsoft’s browser vulnerability research team is working on a mode to make the Edge browser more secure, and it’s given it an incredible name: “Super Duper Secure Mode” (via The Record). The mode is currently very experimental, but could help make it harder for attackers trying to exploit bugs in Microsoft’s browser by turning off certain optimizations.
I can at least somewhat back that up — I turned on Super Duper Secure Mode for myself (if you’re running a test version of Edge, you can enable the mode using a flag), and haven’t noticed any sites feeling particularly sluggish. Of course, everyone’s web use is different, so it’s possible that you’d notice a difference if you spend your days in complex webapps. The Microsoft team does note, though, that it’s looking into making the mode smart by having it turn protections on and off based on the risk a website may pose, or how resource intensive it may be.