A smaller footprint _does_ usually signify a faster load time, but that can easily be overruled by how its internals are parsed (aka, interpreted by the browser).
For example, 1kb script can intentionally block the mainframe for 10seconds, thus making it slower than a 40kb moderate-performing competitor.
Inferno is optimized for the entire performance profile. Preact may load & parse faster -- but only by a HAIR (10-50ms). Inferno does everything else much faster.
So, do you consider the `load` event (which will occur once in the UX) to be more valuable than the every other interaction?