Generally speaking, Electron apps are larger and slower than their native cousins. I just checked on my M1 Mac, and between the Safari extension (which somehow consumes more memory than the app itself) the main app, and various helpers / renderers, it clocks in at 410 MB of RAM. I'll give you that it's also acting as an SSH Agent, but that still seems rather large for the functionality.
Personally, I noticed a slowdown in responsiveness immediately when switching from 7 to 8.
Personally, I noticed a slowdown in responsiveness immediately when switching from 7 to 8.