what do you find sluggish with this electron app?

I just tested it agains sourceTree, which is native, and I can't see any differences. It loads as fast, navigation and selection take the exact same time to load.

The only difference, github desktop eat 200mb instead of 60mb for sourcetree.

At the end of the day I will still use the command line, except for diff. But for a git gui, I can't really see what you mean by sluggish.