See this in regards to the new Slack application: https://slack.engineering/rebuilding-slack-on-the-desktop-30.... It's much faster now.

Also, I would be hard pressed to find a 5 sec increase in an electron app vs a native app.

This article is also worth a read, focusing on why Electron fills a necessary niche: https://medium.com/@felixrieseberg/defeating-electron-e1464d...,