Setinterval timer latency

Timer latency

JS Timer

When setTimeout and setinterval functions are used, the time interval t set for the second parameter is from the time when this function (setTimeout (F1, T) and setinterval (F1, t) are called, after T ms, F1 is added to the UI task queue, but not necessarily executed, especially when other tasks are executed during this period, there may be a time delay. Therefore, when you use the setinterval function to create a timer, a delay occurs.

 

1. var startTime = new Date().getTime();
2. var count = 0;
3. /*setInterval(function(){
4. var i = 0;
5. while(i++ < 100000000);
6. }, 0);*/
8. function fixed() {
9. count++;
10. var offset = new Date().getTime() - (startTime + count * 1000);
11. var nextTime = 1000 - offset;
12. if (nextTime < 0) nextTime = 0;
13. SetTimeout (fixed, nexttime); // corrected the latency
15. console.log(new Date().getTime() - (startTime + count * 1000));
16. }
18. setTimeout(fixed, 1000);

Setinterval timer latency