Recommended Droppable performance optimisation を参考にした。 ドキュメントのとおり実装してみてもカクカクし続けたけど、下の DraggableListItem.shouldComponentUpdateを書いてからカクカクしなくなった! class DraggableListItem extends React.Component { shouldComponentUpdate(nextProps) { return this.props.index !== nextProps.index; // これ! } render() { return ( <Draggable draggableId={this.props.item.id} index={this.props.index}> {(provided, snapshot) => <li
![react-beautiful-dnd パフォーマンス最適化 - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/363f6e810c9ed235d93d0ee65736c7c93df7bbe4/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9cmVhY3QtYmVhdXRpZnVsLWRuZCUyMCVFMyU4MyU5MSVFMyU4MyU5NSVFMyU4MiVBOSVFMyU4MyVCQyVFMyU4MyU5RSVFMyU4MyVCMyVFMyU4MiVCOSVFNiU5QyU4MCVFOSU4MSVBOSVFNSU4QyU5NiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTU2JnM9ZThiN2M1NzNiZWIxODllMTg0NmI2NjUwYzllZDc5MWQ%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBtb3JpeXV1JnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9MzYmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz0wODFhMDdhZGJhYmMwYTJiOGZiOWM3YWUyMDg1ZGQ4YQ%26blend-x%3D142%26blend-y%3D436%26blend-mode%3Dnormal%26txt64%3DaW4gc3RhbmQuZm0sIEluYy4%26txt-width%3D770%26txt-clip%3Dend%252Cellipsis%26txt-color%3D%2523212121%26txt-font%3DHiragino%2520Sans%2520W6%26txt-size%3D36%26txt-x%3D156%26txt-y%3D536%26s%3D5adfd076298972bae6f433a11dc4d7b6)