It's interesting that Jetbrain's CLion Nova is otherwise an excellent IDE, but it can be just glacially slow at times. For instance when bringing up the "fix stuff" popup for a simple "replace with auto" hover suggestion, it can take up to 10 seconds for the popup to show. Clearly the internal structures are broken and/or totally unoptimised. Cmd-clicking on a method can also lead to "Resolving references" for some seconds.