I never had any problems with Babel's performance to be honest... Also a quick check with google trends does seem to support that feeling. https://trends.goog

I never had any problems with Babel's performance to be honest... Also a quick check with google trends does seem to support that feeling. https://trends.google.com/trends/explore?cat=31&date=all&q=Swift%20slow,Babel%20slow https://trends.google.com/trends/explore?cat=31&date=all&q=S... Swift is probably used a lot less than Babel but it yields a lot more spikes...