Function time

code/solutions/22_3_optimizing.js:1–6

(findPath)

function time(findPath) {
  let graph = treeGraph(6, 6);
  let startTime = Date.now();
  let result = findPath(graph[0], graph[graph.length - 1]);
  console.log(`Path with length ${result.length} found in ${Date.now() - startTime}ms`);
}

function findPath_set(a, b) {
  let work = [[a]];