Something I have noticed in 4.5 but has gotten much worse in 5.0.
Any sort of manipulation of shader nodes, as in adding, deleting, moving them, dragging out noodles, has become extremely laggy. The more complex the material, the worse it gets.
Anyone else encounter this?
Welcome to Eevee Next 
if you want better performance, you’ll need to drop down to 4.1
Hello,
This isn’t about rendering. This occurs while working in the shader editor regardless of the render setting. It doesn’t consistently occur though it does seem to get progressively worse the longer I work with the file.
Yes, I know. The shader editor is significantly slower in Eevee Next and gets slower the longer you work. It has to do with how materials and shaders are compiled on the backend
Appreciate the clarification.
Thank you
I have also noticed that the shader editor is laggy in 5.0. Hopefully it gets fixed in future versions.