Nice! Great to see innovation in the Jekyll space.
Quick FYI on Jekyll performance:
I noticed slow generation times on one of my sites and traced it to a plugin that was spawning a git process to get the last commit info for every page. I wrote a drop-in replacement called jekyll-last-commit[0] that uses the ruby libgit2 wrapper for improved performance. Details on its origins are in an old HN comment[1] if you are interested!