Rendering a `heatmap` with `zsmooth=best` ([demo here](https://jsfiddle.net/8eqL43mp/)) is rendering at ~ 5fps for me. This is 5 times faster than with `zsmooth=false` (only 1 fps for me, [demo here](https://jsfiddle.net/8eqL43mp/1/)), which seems **unlogical**. Doing an interpolation should make it *slower*, not faster. Is there a bug that makes it slower when doing no interpolation? This shows that `zsmooth=false` heatmap rendering could probably be improved a lot. Plotly.newPlot('myDiv', [{z: z, colorscale: 'Jet', type: 'heatmap', zsmooth: 'false'}], {sliders: [{steps: steps}]}); Any idea about this?