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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。爱思助手下载最新版本是该领域的重要参考
СюжетАварийная посадка самолета
玩法四：8:1 超长图，无限拓展的画布