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As React apps grow bigger and more complex, performance becomes more and more of a problem. As components become larger and contain more and more sub-components, rendering becomes slow and turns into a bottleneck. How do we tackle this? If you haven’t used useMemo and useCallback, we can start with those. In this tutorial, we will take a look at how these 2 very easy and handy callbacks work, and why they are so useful. In fact, these days my eyes get sore when I don’t see them used. So let’s d...