[Solved] Why is it recommended to apply middleware globally only when necessary in NestJS? — Ans: Because global middleware runs on every request and can impact performance | NestJS

NestJS - Middleware

Why is it recommended to apply middleware globally only when necessary in NestJS?

ABecause global middleware runs on every request and can impact performance

BBecause global middleware cannot access request data

CBecause global middleware cannot be tested

DBecause global middleware disables route handlers

Step-by-Step Solution

Solution:

Step 1: Understand global middleware impact
Global middleware runs on all requests, adding processing overhead.
Step 2: Consider performance implications
Unnecessary global middleware can slow down the app.
Final Answer:
Because global middleware runs on every request and can impact performance -> Option A
Quick Check:
Global middleware affects all requests, so use wisely [OK]

Quick Trick: Use global middleware sparingly to avoid slowdowns [OK]

Common Mistakes:

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