Add links to event pooling docs

content/docs/faq-functions.md

@@ -182,6 +182,8 @@ class Alphabet extends React.Component {
 
 If you have an event handler such as `onClick` or `onScroll` and want to prevent the callback from being fired too quickly, you can wrap the handler with a utility such as [`_.debounce`](https://lodash.com/docs#debounce) or [`_.throttle`](https://lodash.com/docs#throttle). For a given `delay`, say `100ms`, debouncing calls the handler after activity stops for that amount of time; throttling prevents the handler from being called more than once per `delay`. See a visualization [here](http://demo.nimius.net/debounce_throttle/).
 
+Note: Call `event.persist()` when accessing events asynchronously to prevent the synthetic event from being recycled by [event pooling](/docs/events.html#event-pooling). See the debounce [example](#debounce) below.
+
 #### Throttle
 
 ```jsx
@@ -205,7 +207,7 @@ import debounce from 'lodash.debounce'
 
 class Searchbox extends React.Component {
   handleChange = event => {
-    event.persist()
+    event.persist() // https://reactjs.org/docs/events.html#event-pooling
     this._handleChangeDebounced(event.target.value)
   };