Why does tmap render 80 times faster than ggplot2? [Plotting shapefiles in R with ggplot2::geom_sf(), using XQuartz/X11 graphics device on macOS] Why does tmap render 80 times faster than ggplot2? [Plotting shapefiles in R with ggplot2::geom_sf(), using XQuartz/X11 graphics device on macOS] r r