Treating your data as immutable brings many benefits. In fact, that’s a principle behind React: React elements are immutable. You might also be interested in learning about an Immutable App…

Nihad Zeidan

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Using Immutable.js can bring benefits such as faster data updates and improved performance. Copying properties with Object.assign can be slower due to JavaScript's default mutability. Immutable.js uses persistent data structures and structural sharing to optimize data updates and improve performance.

Immutable.js, persistent data structures and structural sharing