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#![feature(test)]
extern crate petgraph;
extern crate test;
use petgraph::prelude::*;
use std::cmp::{max, min};
use test::Bencher;
use petgraph::algo::dijkstra;
#[bench]
fn dijkstra_bench(bench: &mut Bencher) {
static NODE_COUNT: usize = 10_000;
let mut g = Graph::new_undirected();
let nodes: Vec<NodeIndex<_>> = (0..NODE_COUNT).into_iter().map(|i| g.add_node(i)).collect();
for i in 0..NODE_COUNT {
let n1 = nodes[i];
let neighbour_count = i % 8 + 3;
let j_from = max(0, i as i32 - neighbour_count as i32 / 2) as usize;
let j_to = min(NODE_COUNT, j_from + neighbour_count);
for j in j_from..j_to {
let n2 = nodes[j];
let distance = (i + 3) % 10;
g.add_edge(n1, n2, distance);
}
}
bench.iter(|| {
let _scores = dijkstra(&g, nodes[0], None, |e| *e.weight());
});
}
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