Two ways of drawing a line chart with lots of points:

- chained
`lineTo`

commands - grouping points by the x position

Rendering points in a column is about twice as fast with 40k points and three times as fast with a million points. It also gives better control over the anti aliasing blur.

On macOS chrome, the `lineTo`

version also has a rendering bug. The min y value is 0, but points are drawn far above the top grid line.