Faster shortest_path
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For larger graphs, nearly all the time is spent creating dicts of lists of paths. This PR delays creating the lists of paths by duck-typing the return object and returning a Mapping that computes paths as needed. There is virtually no performance penalty for this, and a huge performance gain by delaying computation.
eriknw
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Closes https://github.com/rapidsai/graph_dl/issues/631
For larger graphs, nearly all the time is spent creating dicts of lists of paths. This PR delays creating the lists of paths by duck-typing the return object and returning a Mapping that computes paths as needed. There is virtually no performance penalty for this, and a huge performance gain by delaying computation.
Moved from here: rapidsai/cugraph#4739