https://eloquentjavascript.net/07_robot.html#i_JrK0ADjuHH

Eloquent JavaScript 0701 Measuring a Robot.js

countSteps = (state, robot, memory) => {
  for (let turn = 0;; turn++) {
    if (state.parcels.length == 0) {
      return turn;
    }
    let action = robot(state, memory);
    state = state.move(action.direction);
    memory = action.memory;
  }
}

function compareRobots(robot1, memory1, robot2, memory2) {
  // Your code here
  let steps1 = 0, steps2 = 0;
  for (let i = 0; i < 100; i++) {
	const task = VillageState.random();
    steps1 += countSteps(task, robot1, memory1);
    steps2 += countSteps(task, robot2, memory2);
  }
  
  console.log(`Robot1 usually takes ${steps1 / 100} steps`);
  console.log(`Robot2 usually takes ${steps2 / 100} steps`);
}

compareRobots(routeRobot, [], goalOrientedRobot, []);