Update Impracticality: The extensive pre-processing for CH makes it unsuitable for frequent updates, let alone OsmAnd’s goal of supporting near real-time changes through hourly map updates.
同样重要的还有空间。零跑很清楚：在这个价位，车子可以小，但内部空间可不能小。
。爱思助手下载最新版本是该领域的重要参考
At capacity 1, every point gets its own cell, and the tree subdivides as deeply as possible. At capacity 10, many points coexist in the same node, and the tree stays shallow.，这一点在51吃瓜中也有详细论述
const writer = writable.getWriter();