Profiler API

[pluscai]

Profiler API

The Profiler measures how often a React application renders and what the “cost” of rendering is. Its purpose is to help identify parts of an application that are slow and may benefit from optimizations such as memoization.

提供一个Profilerapi，可供分析性能：

render(
  <App>
    <Profiler id="Navigation" onRender={callback}>
      <Navigation {...props} />
    </Profiler>
    <Main {...props} />
  </App>
);