About Gadfly. If you were plotting it in a notebook then the default is to make it an interactive figure. In that case a lot of overhead comes from the browser

About Gadfly. If you were plotting it in a notebook then the default is to make it an interactive figure. In that case a lot of overhead comes from the browser trying to render it. You can explicitly invoke e.g., draw(SVG(10cm,10cm), plot(...)) to make it much faster.