/Javascript/React/Event pooling in react/event.persist/using async function in event callback

Event pooling in react/event.persist/using async function in event callback

Event Pooling - React uses SyntheticEvent which is a wrapper for native browser events so that they have consistent properties across different browsers. The event handlers that we have in any react-app are actually passed instances of SyntheticEvent unless we use nativeEvent attribute to get the underlying browser event.

Wrapping native event instances can cause performance issues since every synthetic event wrapper that's created will also need to be garbage collected at some point, which can be expensive in terms of CPU time.

React deals with this problem by allocating a synthetic instance pool. Whenever an event is triggered, it takes an instance from the pool and populates its properties and reuses it. When the event handler has finished running, all properties will be nullified and the synthetic event instance is released back into the pool. Hence, increasing the performance.

Source: stackoverflow.com

Similar codes

0 vote314 views1 answer
Formdata append react js
Javascript React
1 vote342 views1 answer
React native textinput not show cursor
Javascript React
0 vote326 views1 answer
Pass text to button component react
Javascript React
1 vote356 views3 answers
React toggle state
Javascript React
0 vote305 views5 answers
React native cache clear
Javascript React
1 vote296 views2 answers
'Switch' is not exported from 'react-router-dom'
Javascript React
0 vote317 views1 answer
Sort by attribute in reactjs
Javascript React
0 vote323 views1 answer
Vscode react cannot find moudle when import image
Javascript React
19 votes253 views10 answers
'Switch' is not exported from 'react-router-dom'. ch warning.
Javascript React
0 vote327 views1 answer
Get call log in react native with filter android
Javascript React