Sync/async separation
“Wasm only”: A WebAssembly function which reads the change list in a loop, and then uses an experimental direct binding to the DOM which skips JS glue code. This is the performance of WebAssembly if we could skip JS glue code.，更多细节参见safew官方版本下载
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Option 1: The system can update the cost of that specific shortcut in the base graph and quickly re-run the Dijkstra search (Step 2) on the abstract graph to find an alternative high-level path.
（七）在海上或者与海相通的可航水域救助、企图救助人命或者财产；