Nearly as lightweight and responsive as Visual Studio Code, despite providing much more features. And ReSharper C++ provides support for C++ and Unreal Engine as the extension to the Visual Studio. Rider already provides excellent support for C# and Unity, with a customized UI and debugger. For example, CLion is a standard JetBrains for C++, but they work towards making Rider (traditionally a C# IDE) the 'gamedev IDE'. This company is well-known for providing excellent tools for programmers, especially multiple IDEs specialized in specific languages and industries. Rider is a new option for C++ in general and Unreal Engine from JetBrains.
Yes, this is a Preview, but already beat Visual Studio or Visual Studio Code in almost everything.
There are few IDE (Integrated Development Environment) supported by Unreal Engine. Edit Page History Report Choosing & Preparing Integrated Development Environment for Unreal C++ What do you need to efficiently work with Unreal C++?