How speed efficient is Enfold?

Tbh I can’t answer the question because I don’t have a reference point for a comparison. Enfold comes with a lot of unique features which require additional code and obviously this code will always slow down your website a bit. Compared to a simple theme like TwentyTwelve Enfold is not speed optimized because we’d need to strip all these features for a fair comparison. That said we created most parts with the loading performance in mind (sometimes it’s not possible because of browser compatibility reasons, etc.) and Kriesi also works on some framework improvements to reduce the php memory usage.