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Unexpected build time and bundle size increases in Next.js 16

7/10 High

Upgrading to Next.js 16 causes significant, unexpected increases in build times and output bundle sizes. Projects that previously built quickly now consume more CI/CD resources and produce larger bundles, harming Core Web Vitals.

Next.js
Category
build
Workaround
partial
Stage
build
Freshness
emerging
Scope
framework
Upstream
open
Recurring
Yes
Buyer Type
team
Maintainer
active

Sources

Collection History

Query: “What are the most common pain points with Next.js in 2025?”3/27/2026

Projects that previously built swiftly might now take significantly longer, consuming more CI/CD resources. Output bundle sizes could bloat, leading to slower initial page loads and poorer Core Web Vitals scores.

Created: 3/27/2026Updated: 3/27/2026