Accuracy of setTimeout in React Native

后端 未结 2 422
一个人的身影
一个人的身影 2021-01-19 02:05

I\'m building a metronome in React Native. After playing a click, I set a setTimeout for the next click. The timing however, is awful.

I did the followi

2条回答
  •  梦毁少年i
    2021-01-19 02:59

    The delay that you configure for setTimeout and setInterval should never be thought of as an exact delay time. They represent the "minimum" amount of time that you'll wait before the function is executed. This is because the user-agent places the callback into the event queue when the time has elapsed, but if the user-agent is still working on some other task, the callback will sit there.

    You should also know that there is a built-in absolute minimum time that you are never going to be able to go under of roughly 9-14ms. This is due to the internals of the user-agent.

提交回复
热议问题