To test Mosaic we developed vgplot, a Mosaic-based grammar of interactive graphics that uses Observable Plot to perform chart rendering. Our initial benchmark studies show order-of-magnitude performance improvements over Vega, VegaFusion, and standard Observable Plot.
ALT Charts of visualization rendering performance, comparing different tools (Vega, VegaFusion, Observable Plot, and Mosaic) and chart types (average bars, linear regression, 2d histograms, area charts, density contours, and hexbins). Mosaic provides superior performance, often by one or more orders of magnitude.