I haven't found Jetbrains IDEs to be slow in my personal experience. Assuming a beefy CPU and enough memory, I've found Intellij to be really zippy - instantly

I haven't found Jetbrains IDEs to be slow in my personal experience. Assuming a beefy CPU and enough memory, I've found Intellij to be really zippy - instantly switching between files in large projects, no lag during text editing etc. I can understand why you have this idea though - most other IDEs I have used have been noticeably sluggish compared to more lightweight editors even on high end hardware.