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+<!DOCTYPE html>
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+<html>
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+<head>
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+ <meta charset="utf-8">
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+ <title>Svetophor</title>
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+</head>
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+<body>
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+ <style>
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+ .wrapper{
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+ background:#333;
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+ width: 150px;
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+ height: 440px;
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+ border-radius: 10px;
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+ font-size: 70px;
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+ text-align:center;
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+ padding: 1px 0;
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+ border: 6px solid #000;
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+ margin: auto;
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+
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+ }
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+
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+ .wrapper2 {
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+ background:#333;
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+ width: 150px;
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+ height: 299px;
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+ border-radius: 10px;
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+ font-size: 70px;
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+ text-align:center;
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+ padding: 1px 0;
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+ border: 6px solid #000;
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+ margin: auto;
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+ }
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+
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+ #circle1, #circle2, #circle3, #cir1, #cir2{
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+ background:grey;
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+ width: 120px;
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+ height: 120px;
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+ border-radius: 50%;
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+ margin-left: 15px;
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+ margin-top: 20px;
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+ line-height: 120px;
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+ }
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+
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+ #btn{
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+ border-radius: 50%;
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+ width: 40px;
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+ height: 40px;
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+ margin-left: 47%;
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+ margin-top: 15px;
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+ margin-bottom: 100px;
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+ }
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+
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+ #btn:hover{
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+ opacity: 0.6;
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+ }
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+
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+ p{
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+ margin: 60px;
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+ }
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+ </style>
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+
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+ <div class="wrapper">
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+ <div id="circle1">
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+ </div>
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+ <div id="circle2">
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+ </div>
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+ <div id="circle3">
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+ </div>
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+ </div>
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+ <p></p>
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+
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+ <div class="wrapper2">
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+ <div id="cir1">
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+ </div>
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+ <div id="cir2">
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+ </div>
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+ </div>
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+ <input type="submit" id="btn" value="☃" />
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+
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+ <script>
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+//----------------------------светофор
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+
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+ const delay = ms => new Promise(ok => setTimeout(() => ok(ms), ms))
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+
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+ function timer(elem,ms){
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+ let count=ms;
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+ let number=document.createElement('span');
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+ number.innerHTML=count;
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+ number.style.color='blue';
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+ elem.append(number);
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+ let h=setInterval(()=>{
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+ number.innerHTML=--count;
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+ if(count==0){
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+ clearInterval(h);
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+ number.remove();
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+ }
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+ },1000);
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+ }
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+
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+ function g1(){
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+ timer(circle3,6);
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+ circle3.style.background='green';
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+ }
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+
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+ function g2(){
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+ circle3.style.background='grey';
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+ }
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+
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+ function y1(){
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+ timer(circle2,2);
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+ circle2.style.background='yellow';
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+ }
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+
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+ function y2(){
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+ circle2.style.background='grey';
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+ }
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+
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+ function r1(){
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+ timer(circle1,10);
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+ circle1.style.background='red';
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+ }
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+
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+ function r2(){
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+ circle1.style.background='grey';
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+ }
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+
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+ async function trafficLight(delayGreen,delayYellow,delayRed){
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+ while (true){
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+ y2()
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+ g1()
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+ await delay(delayGreen)
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+ g2()
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+ y1()
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+ await delay(delayYellow)
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+ y2()
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+ r1()
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+ await delay(delayRed)
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+ r2()
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+ y1()
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+ await delay(delayYellow)
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+ }
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+ }
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+
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+ (async()=>{
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+ await trafficLight(6000,2000,10000);
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+ })();
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+
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+//----------------------domEventPromise
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+ async function domEventPromise(knopka,event){
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+ return new Promise((resolve,reject)=>{
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+ try{
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+ knopka.addEventListener(event,async(e)=>{
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+ resolve(e);
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+ knopka.removeEventListener(event,this);
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+ })
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+ }catch(e){
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+ reject(e);
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+ }
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+ })
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+ }
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+ //domEventPromise(btn, 'click').then(e => console.log('event click happens', e));
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+
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+//--------------PedestrianTrafficLight
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+ async function PedestrianTrafficLight(){
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+ while(true){
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+ cir1.style.backgroundColor = 'red';
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+ await Promise.race([
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+ domEventPromise(btn, 'click').then(async (e) => {
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+ cir1.style.backgroundColor = 'grey';
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+
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+ cir2.style.backgroundColor = 'green';
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+ timer(cir2,4);
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+ await delay(4000);
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+ cir2.style.backgroundColor = 'grey';
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+ cir1.style.backgroundColor = 'red';
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+ timer(cir1,7);
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+
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+ }, err => console.log(err))
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+ ]);
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+ await delay(7000);
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+ }
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+ }
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+
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+ (async () => await PedestrianTrafficLight())();
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+
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+
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+//-----------speedTest
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+ async function speedTest(getPromise, count, parallel=1){
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+ let duration, querySpeed, queryDuration, parallelSpeed, parallelDuration;
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+ let start = performance.now();
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+ let arr = [];
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+ await (async () => {
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+ for (let i=0;i<count;i++) {
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+ let arrPromise = []
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+ for (let j=0;j<parallel;j++) {
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+ arrPromise.push(getPromise);
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+ }
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+ let querySpeedItemStar=performance.now();
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+ await Promise.all([...arrPromise.map(item => item())]);
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+ arr.push(performance.now()-querySpeedItemStart);
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+ }
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+ })()
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+
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+ duration = Math.round(performance.now() - start);
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+ querySpeed = (count*parallel)/100000;
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+ queryDuration = arr.reduce((a,b)=>(a+b))/arr.length;
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+ parallelSpeed = duration/(count*parallel)/10000;
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+ parallelDuration = duration/(count*parallel);
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+
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+ return{
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+ duration,
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+ querySpeed,
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+ queryDuration,
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+ parallelSpeed,
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+ parallelDuration
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+ }
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+ }
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+
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+ speedTest(()=>delay(1000),10,10).then(result=>console.log(result));
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+
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+ speedTest(()=>fetch('http://swapi.dev/api/people/1').then(res => res.json()), 10, 5)
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+
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+ </script>
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+
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+</body>
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+</html>
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