Datashader Rasterization
Past roughly 100k points a scatter plot fails: overplotting saturates pixels and the renderer ships more marks than the screen has pixels. Datashader instead aggregates the full dataset into a fixed-size grid server-side (count, mean, etc. per pixel), then shades the aggregate into an image, making a billion points as cheap to display as the screen resolution.
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Past roughly 100k points a scatter plot fails: overplotting saturates pixels and the renderer ships more marks than the screen has pixels. Datashader instead aggregates the full dataset into a fixed-size grid server-side (count, mean, etc. per pixel), then shades the aggregate into an image, making a billion points as cheap to display as the screen resolution.
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