[Solved] Why does Angular's OnPush strategy rely on immutable data patterns for optimal performance? — Ans: Because OnPush detects changes by comparing input references, not deep object... | Angular

Angular - Performance Optimization

Why does Angular's OnPush strategy rely on immutable data patterns for optimal performance?

ABecause OnPush disables all change detection except for immutable inputs

BBecause Angular cannot detect any changes without immutable data

CBecause OnPush detects changes by comparing input references, not deep object mutations

DBecause mutable data causes Angular to throw errors with OnPush

Step-by-Step Solution

Solution:

Step 1: Understand OnPush detection mechanism
OnPush checks input references to detect changes, ignoring deep mutations inside objects.
Step 2: Connect to immutable data
Immutable data ensures new references on changes, allowing OnPush to detect updates efficiently.
Final Answer:
Because OnPush detects changes by comparing input references, not deep object mutations -> Option C
Quick Check:
OnPush + immutable data = efficient reference checks [OK]

Quick Trick: OnPush compares references, so use immutable data [OK]

Common Mistakes:

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Why does Angular's OnPush strategy rely on immutable data patterns for optimal performance?