@benchgroup "traversals" begin
  @benchgroup "graphs" begin
    for (name, g) in GRAPHS
        @bench "$(name): bfs_tree" LightGraphs.bfs_tree($g, 1)
        @bench "$(name): dfs_tree" LightGraphs.dfs_tree($g, 1)
    end
  end # graphs
  @benchgroup "digraphs" begin
    for (name, g) in DIGRAPHS
        @bench "$(name): bfs_tree" LightGraphs.bfs_tree($g, 1)
        @bench "$(name): dfs_tree" LightGraphs.dfs_tree($g, 1)
    end
  end # digraphs
end # traversals
