save(); dump(); load(); what about clear() -> use reset(true)

After reset();save(); the only command history left will be that of you typing save(). While there may seem to be a few hundred bytes used most of that is just an artefact of compressing ~80kB of zeros.

I think you'll find that reset();save() reports almost exactly the same number of bytes used as if you just flashed a fresh Espruino image and typed save()