Many programmers use malloc() and free() and pay no more mind to "allocating memory", but I often find 2-20× speed improvements by rethinking memory
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.。关于这个话题，Line官方版本下载提供了深入分析
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2. 环境准备（macOS 本地）