With a thousand points, you barely notice the delay. With a million, you're doing a million distance calculations for every single query. On a phone updating the map as the user scrolls, that's untenable.
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We step on to Siri, a larger "mother platform" that has a control centre manned by offshore workers.
The case is expected to continue for several weeks, and the outcome the jury reaches could shape the outcome of a slew of similar lawsuits against social media companies. Meta is also facing a separate trial in New Mexico.