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#![feature(test)]
extern crate petgraph;
extern crate test;
mod common;
use common::ungraph;
use hashbrown::HashSet;
use petgraph::algo::{all_simple_paths, all_simple_paths_multi};
use petgraph::prelude::*;
use test::Bencher;
#[bench]
fn complete_graph_single_bench(bench: &mut Bencher) {
static NODE_COUNT: usize = 6;
let mut g = Graph::new_undirected();
let nodes: Vec<NodeIndex> = (0..NODE_COUNT).map(|_| g.add_node(())).collect();
// Create a complete undirected graph - every pair of nodes has an edge
for i in 0..NODE_COUNT {
for j in i + 1..NODE_COUNT {
g.add_edge(nodes[i], nodes[j], ());
}
}
let from = nodes[0];
let targets: Vec<_> = (1..NODE_COUNT).map(|i| nodes[i]).collect();
bench.iter(|| {
let mut total_paths = 0;
for &to in &targets {
let paths = all_simple_paths::<Vec<_>, _, fxhash::FxBuildHasher>(&g, from, to, 0, None);
total_paths += paths.count();
}
total_paths
});
}
#[bench]
fn complete_graph_multi_bench(bench: &mut Bencher) {
static NODE_COUNT: usize = 6;
let mut g = Graph::new_undirected();
let nodes: Vec<NodeIndex> = (0..NODE_COUNT).map(|_| g.add_node(())).collect();
// Create a complete undirected graph - every pair of nodes has an edge
for i in 0..NODE_COUNT {
for j in i + 1..NODE_COUNT {
g.add_edge(nodes[i], nodes[j], ());
}
}
let from = nodes[0];
let to: HashSet<_, fxhash::FxBuildHasher> = (1..NODE_COUNT).map(|i| nodes[i]).collect();
bench.iter(|| {
let paths =
all_simple_paths_multi::<Vec<_>, _, fxhash::FxBuildHasher>(&g, from, &to, 0, None);
paths.count()
});
}
#[bench]
fn petersen_single_bench(bench: &mut Bencher) {
let g = ungraph().petersen_a();
let from = NodeIndex::new(0);
let targets: Vec<_> = (1..g.node_count()).map(NodeIndex::new).collect();
bench.iter(|| {
let mut total_paths = 0;
for &to in &targets {
let paths = all_simple_paths::<Vec<_>, _, fxhash::FxBuildHasher>(&g, from, to, 0, None);
total_paths += paths.count();
}
total_paths
});
}
#[bench]
fn petersen_multi_bench(bench: &mut Bencher) {
let g = ungraph().petersen_a();
let from = NodeIndex::new(0);
let to: HashSet<_, fxhash::FxBuildHasher> = (1..g.node_count()).map(NodeIndex::new).collect();
bench.iter(|| {
let paths =
all_simple_paths_multi::<Vec<_>, _, fxhash::FxBuildHasher>(&g, from, &to, 0, None);
paths.count()
});
}
#[bench]
fn bipartite_single_bench(bench: &mut Bencher) {
let g = ungraph().bipartite();
let from = NodeIndex::new(0);
let targets: Vec<_> = (1..g.node_count()).map(NodeIndex::new).collect();
bench.iter(|| {
let mut total_paths = 0;
for &to in &targets {
let paths = all_simple_paths::<Vec<_>, _, fxhash::FxBuildHasher>(&g, from, to, 0, None);
total_paths += paths.count();
}
total_paths
});
}
#[bench]
fn bipartite_multi_bench(bench: &mut Bencher) {
let g = ungraph().bipartite();
let from = NodeIndex::new(0);
let to: HashSet<_, fxhash::FxBuildHasher> = (1..g.node_count()).map(NodeIndex::new).collect();
bench.iter(|| {
let paths =
all_simple_paths_multi::<Vec<_>, _, fxhash::FxBuildHasher>(&g, from, &to, 0, None);
paths.count()
});
}
#[bench]
fn full_single_bench(bench: &mut Bencher) {
let g = ungraph().full_a();
let from = NodeIndex::new(0);
let targets: Vec<_> = (1..g.node_count()).map(NodeIndex::new).collect();
bench.iter(|| {
let mut total_paths = 0;
for &to in &targets {
let paths = all_simple_paths::<Vec<_>, _, fxhash::FxBuildHasher>(&g, from, to, 0, None);
total_paths += paths.count();
}
total_paths
});
}
#[bench]
fn full_multi_bench(bench: &mut Bencher) {
let g = ungraph().full_a();
let from = NodeIndex::new(0);
let to: HashSet<_, fxhash::FxBuildHasher> = (1..g.node_count()).map(NodeIndex::new).collect();
bench.iter(|| {
let paths =
all_simple_paths_multi::<Vec<_>, _, fxhash::FxBuildHasher>(&g, from, &to, 0, None);
paths.count()
});
}
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