[Solved] If an impure pipe is used in a template with a large list, what is the likely performance impact? — Ans: The pipe recalculates on every change detection, slowing rendering | Angular

Angular - Pipes

If an impure pipe is used in a template with a large list, what is the likely performance impact?

AThe pipe recalculates once and caches results

BThe pipe recalculates on every change detection, slowing rendering

CThe pipe skips recalculation to improve speed

DThe pipe only recalculates when the list length changes

Step-by-Step Solution

Solution:

Step 1: Recall impure pipe behavior
Impure pipes run on every change detection cycle regardless of input changes.
Step 2: Consider large list impact
Recalculating on every cycle with large data slows rendering and hurts performance.
Final Answer:
The pipe recalculates on every change detection, slowing rendering -> Option B
Quick Check:
Impure pipe + large data = slow rendering [OK]

Quick Trick: Impure pipes with big data cause slow rendering [OK]

Common Mistakes:

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If an impure pipe is used in a template with a large list, what is the likely performance impact?