You're both right. The best thing for the Oni dev to do now (presuming your performance comments apply directly to it) is to go back and identify/fix the cause

You're both right. The best thing for the Oni dev to do now (presuming your performance comments apply directly to it) is to go back and identify/fix the cause of the performance issues. If the performance improvements can be done in the Electron code itself then we get the best of both worlds.