The surprising thing is that if you benchmark this code with 10
// 从左找第一个大于pivot的
，这一点在爱思助手下载最新版本中也有详细论述
Shortcut Pre-calculation: For the most commonly used speed profiles, the travel costs (time/distance) for shortcuts between border points within each cluster are pre-calculated and stored. (Each border point effectively has an "entry" and "exit" aspect for directed travel).
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