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Andrew Clark
4a1072194f
* Memoize promise listeners to prevent exponential growth Previously, React would attach a new listener every time a promise is thrown, regardless of whether the same listener was already attached during a previous render. Because React attempts to render every time a promise resolves, the number of listeners grows quickly. This was especially bad in synchronous mode because the renders that happen when the promise pings are not batched together. So if a single promise has multiple listeners for the same root, there will be multiple renders, which in turn results in more listeners being added to the remaining unresolved promises. This results in exponential growth in the number of listeners with respect to the number of IO-bound components in a single render. Fixes #14220 * Memoize on the root and Suspense fiber instead of on the promise * Add TODO to fix persistent mode tests
react
React is a JavaScript library for creating user interfaces.
The react package contains only the functionality necessary to define React components. It is typically used together with a React renderer like react-dom for the web, or react-native for the native environments.
Note: by default, React will be in development mode. The development version includes extra warnings about common mistakes, whereas the production version includes extra performance optimizations and strips all error messages. Don't forget to use the production build when deploying your application.
Example Usage
var React = require('react');