Improve Performance

In this meta-issue, I want to collect strategies for improving Vega's computation and rendering performance.

Related issues

• Support interactive framerates on large heatmaps #1806
• Look into desynchronized canvas #1821
• Cursor signal and hover cursor property has major performance impact in Chrome #2439
• Improve Canvas renderer damage / redraw methods #1787

Relevant software to look at

• https://github.com/jpkli/p4 (paper: https://ieeexplore.ieee.org/abstract/document/8468065)
• https://stardustjs.github.io/ (paper: https://stardustjs.github.io/publications/eurovis2017-stardust.pdf)
• https://genomespy.app/ (Vega-Lite like language for fast visualizations)
• https://github.com/vega/vega-webgl-renderer
• https://github.com/microsoft/SandDance/tree/master/packages/vega-deck.gl

Please add comments below if you have further resources or ideas for how we can improve performance.