Shortcuts: For common scenarios, we pre-calculate the travel time/distance (the "shortcut") between border points within the same cluster and also to border points of immediately adjacent clusters.
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"We’ve done a lot to improve performance and consistency in Node streams, but there’s something uniquely powerful about starting from scratch. New streams’ approach embraces modern runtime realities without legacy baggage, and that opens the door to a simpler, performant and more coherent streams model."