Jetbrains IDEs performance is so abysmal I quickly get annoyed and move to something else. Same with XCode.
I find VSCode to be the most feature rich editor whose speed I can tolerate.
VSCode is by no means ideal in terms of resource consumptions or startup speed but the community picked up VSCode for the golden path in the languages I code with (rust, node.js, frontend js) and using other lighter editors is a significant downgrade.
Sublime was incredibly promising but it's not enough feature wise for my experience.
I'd literally throw money into a native and more performant/lightweight VSCode.
NB: IDEA performance is improved drastically by giving it more memory. Basically every time someone complains about perf issues with IDEA it's because their heap limit is too low. It can be configured via the help menu.
One of the unfortunate (or fortunate?) design decisions in IDEA is that there's an explicit and user configurable tradeoff between performance and memory usage, but the defaults are far too low. And if it's too low only the most very recent versions can detect this and tell you what to do about it.
There are several projects attempting to develop a native smart editor. For Mac users there is Nova (https://nova.app/) and for the Vim crowd there is Onivim (https://onivim.io/).
I have used neither of them but I find them intriguing, especially when I wait for my VSCode cursor to catch up with my typing.
I find VSCode to be the most feature rich editor whose speed I can tolerate. VSCode is by no means ideal in terms of resource consumptions or startup speed but the community picked up VSCode for the golden path in the languages I code with (rust, node.js, frontend js) and using other lighter editors is a significant downgrade.
Sublime was incredibly promising but it's not enough feature wise for my experience. I'd literally throw money into a native and more performant/lightweight VSCode.