I had the same issue when I was working on my React Native hobby project called Sudoku Mobile (shameless plug here).
My laptop almost became unusable and my battery was draining very quickly. I switched to Atom (another Electron based app :D) for the project and I didn't have this issue anymore, but I really missed VSCode.
Atom is also good. You may wanna share some resources for it ?
I don't really know about any good stuff for atom as I didn't use it much in the end. I went back to VSCode within a few days and tolerated the performance issues. Atom couldn't property comment JSX at the time (for me at least) and that made me switch back.
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