They do mention "rendering and performance improvements", and the linked pull request [1] mentions "much faster cold startup time and general increase in respon

They do mention "rendering and performance improvements", and the linked pull request [1] mentions "much faster cold startup time and general increase in responsiveness". I don't know if that means it's fast enough to replace other editors now, but it's promising. [1] https://github.com/atom/atom/pull/11474 https://github.com/atom/atom/pull/11474