Optimizing React Context Performance

React Context can cause unnecessary re-renders. Here's how to optimize it.

The Problem#

Solution 1: Split Contexts#

Solution 2: Separate State and Dispatch#

Solution 3: Memoize Context Value#

Solution 4: Selector Pattern#

Solution 5: Component Composition#

Solution 6: Ref for Non-Reactive State#

Measuring Performance#

Best Practices#

Conclusion#

Context performance issues stem from unnecessary re-renders when any context value changes. Split contexts by domain, separate state from dispatch, memoize values, and consider selector patterns for granular subscriptions. Always profile to identify actual bottlenecks before optimizing.