Right, I also misconstrued the original commenter as suggesting using it for many people when I realized (after my previous comment) they meant for one user. However, they still are describing moving rendering some kind of markup to HTML to the critical path with live reloading. In that case, performance is absolutely critical (as stated in the initial article too) because, well, it's on the critical path. A 10 second delay in a "live reloading" situation (suppose a two pane view with markup on the left and rendered HTML on the right) would become intolerable if every character change resulted in that kind of delay. So yes, in that case something that can render it faster would be better.

But if it's just a personal blog? Who cares if it takes 10 seconds or 1 second unless it's rendering many people's blogs? In which case it would, again, be moved to the system's critical path as a blog hosting service.