Vladimir Agafonkin (creator of Leaflet) has released v4 of Delaunator. It’s a super-fast library for Delaunay triangulation and the latest update improves performance by up to 10%. His other libraries are worth checking out as he’s obsessed with making them as fast as possible — handy for animation and 3D visualisation.
mapbox/delaunator
An incredibly fast JavaScript library for Delaunay triangulation of 2D points - mapbox/delaunator
GitHub