---
id: isScrolling
title: Optimizing scrolling performance
sidebar_label: Optimizing scrolling performance
---
<iframe src="https://codesandbox.io/embed/009205kk4n?autoresize=1&hidenavigation=1&view=preview" style="width:100%; height:650px; border:0; border-radius: 4px; " sandbox="allow-modals allow-forms allow-popups allow-scripts allow-same-origin"></iframe>

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You can see the code by clicking the blue rectangular Show Editor View button above, and also edit the example in the code editor directly.

Overview
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For formatters that are expensive to render it is possible to render a simple placeholder when scrolling to improve scroll performance