7 practical tips on performance optimizations in React applications

The post says React performance optimization should begin with the problems that have the biggest impact. It advises measuring bottlenecks first, avoiding premature optimization, and keeping the codebase free of unnecessary changes.

It also recommends code-splitting to reduce initial load, memoizing to prevent unnecessary rerenders, monitoring bundle size, and improving business logic when that is where the slowdown comes from.

Reading notes

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• Measure performance problems before optimizing, and focus on the bottlenecks that matter most.
• Avoid spending time on non-essential improvements or changes without evidence that they help.
• Split code into multiple bundles and load assets only when they are needed.
• Use useMemo and useCallback to reduce unnecessary rerenders caused by new object or function references.
• Keep checking bundle size and look for ways to reduce it.
• Optimize business logic first when the slowdown comes from application code rather than React itself.