Reduce find_indirect_clusters() complexity from O(exp(n)) to O(n) #2071
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I was trying to generate a testset from
KnowledgeGraph(nodes: 1861, relationships: 912103)
and it would go on for two days in a row without any progress. So I did some profiling to see what's going on on a smaller KG and found that most of the time was being spent infind_indirect_clusters()
.Here is an optimised implementation that seem to produce similar results but way faster. On my reduced size KG I'm down from 5 min to a fraction of a second and on the full KG I'm down from never finished to a few seconds.