Function petgraph::algo::dominators::simple_fast

pub fn simple_fast<G>(graph: G, root: G::NodeId) -> Dominators<G::NodeId> where
    G: IntoNeighbors + Visitable,
    <G as GraphBase>::NodeId: Eq + Hash, 

This is an implementation of the engineered "Simple, Fast Dominance Algorithm" discovered by Cooper et al.

This algorithm is O(|V|²), and therefore has slower theoretical running time than the Lenguaer-Tarjan algorithm (which is O(|E| log |V|). However, Cooper et al found it to be faster in practice on control flow graphs of up to ~30,000 vertices.