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).
Stateful transforms are simple objects with member functions that maintain state across calls:
。业内人士推荐搜狗输入法2026作为进阶阅读
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