Back to listCategory performance Workaround partial Stage build Freshness persistent Scope single_lib Recurring Yes
Heavy Middleware Logic Increases Time to First Byte
6/10 MediumMiddleware that runs on every request with large libraries or poor tree-shaking increases TTFB, which directly affects FCP and LCP metrics.
Collection History
Query: “What are the most common pain points with Next.js in 2025?”3/27/2026
Middleware runs on every request. Problems arise when middleware includes: Large libraries. Heavy imports. Poorly tree-shaken dependencies. This increases TTFB, which directly affects both FCP and LCP.
Created: 3/27/2026Updated: 3/27/2026