AleksandrovHomeWork/homeWork13AsyncAwait/index.js

const delay = ms => new Promise(ok => setTimeout(() => ok(ms), ms))

async function changeColor(color, duration, div) {
    div.style.background = color;
    await delay(duration);
    div.style.background = 'gray';
}

async function trafficLight(){
    while (true){
        await changeColor('green', 2000, green)
        await changeColor('yellow', 1000, yellow)
        await changeColor('red', 3000, red)
    }
}
trafficLight()

function domEventPromise(element, eventName) {
    return new Promise(function(resolve, reject) {
       let listener = function (event) {
          element.removeEventListener(eventName, listener)
          resolve(event)
          if(event) {
              element.setAttribute("disabled", "disabled");
              delay(5000).then(result => element.removeAttribute("disabled", "disabled"))
              
          }
       }
       element.addEventListener(eventName, listener)
    })
 }

 async function changeColorPedestrian(color, duration, div) {
    div.style.background = color;
    await delay(duration);
}

async function pedestrianTrafficLight(){
    while (true){
        Promise.race([
            domEventPromise(btn, 'click').then( result => {
                changeColorPedestrian('green', 2000, light)
            }),
            await changeColorPedestrian('green', 2000, light),
            await changeColorPedestrian('red', 3000, light)  
        ])
    }
}
pedestrianTrafficLight()

///////////////////////////////////////////////
//speedtest 
async function speedtest(getPromise, count, parallel = 1) {

  let firstTime = performance.now();
  for (let i = count; i > 0; i--) {
     let promiseArr = [];
     for (let j = parallel; j > 0; j--) {           
        promiseArr.push(getPromise())
     }
     console.log(promiseArr);
     await Promise.all(promiseArr);
  }
  let duration = performance.now() - firstTime;
  let parallelDuration = duration / (parallel*count);
  let parallelSpeed = (parallel*count) / duration;
  let queryDuration = duration / count;
  let querySpeed = 1 / queryDuration;

  return {
          duration,
          querySpeed, //средняя скорость одного запроса
          queryDuration, 
          parallelSpeed,
          parallelDuration
      }
  }
  speedtest(() => delay(1000), 10, 10).then((result) => console.log(result));
  speedtest(() => fetch('http://swapi.dev/api/people/1').then(res => res.json()), 10, 5).then(result => console.log(result))