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Eager-vs-lazy tradeoff in the InducedSubgraphView spirit: the view is immutable, so cached aggregations never invalidate within a level. - ensureEagerCache() materializes supernodes whose estimated work (member degree sum) exceeds eagerNeighborThreshold, in parallel, once per level; wired into ParallelLeidenView after each new view is created. - computeNeighbors() lazily promotes any other hot supernode on first visit. - Per-entry mutexes keep it thread-safe; threshold tunable via NETWORKIT_LEIDEN_EAGER_THRESHOLD (0 = cache all, none = lazy only).
adsharma
added this pull request to stack #79
September 14, 2026 21:56
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Stacks on #77 (flat sort-combine + phase shrink). Adds an adaptive eager neighbor cache: hot supernodes materialized once per level via ensureEagerCache(), cold ones stay lazy with promotion on first hot visit. View immutability means no invalidation logic. Threshold via NETWORKIT_LEIDEN_EAGER_THRESHOLD (default 2048, 0 = all, none = off).
Tests: networkit_tests eiden:oarsen:nducedSubgraph 46/46 passed.