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.
View this post on Instagram，这一点在旺商聊官方下载中也有详细论述
the 96-column three-row card, which was nearly square. The only computer ever，详情可参考51吃瓜
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