What's your experience with the new Leaflet HDX been like?
As we work on the HDX algorithm visualizations with the Leaflet maps, we're seeing that the efficiency is a mixed bag. With relatively small graphs (up to a few hundred waypoints and connections, at least) it's probably faster and smoother than Google was. But as things get big (a few thousand waypoints and connections), the whole thing slows down. I am suspicious that the markers and polylines are ALL redrawn any time ANY marker or polyline is modified, even if there is no pan or zoom.
Checking this out and hopefully optimizing is likely to become a priority for me before the end of summer, as we are hoping to submit a paper about the newest developments on the algorithm visualization side of things.