Next.js 16 vs Next.js 16

Real-world performance comparison based on identical SaaS dashboard implementations.

Next.js 16

Next.js 16

Vercel

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Next.js deployed on its native platform—the way it was designed to run. Vercel's infrastructure is purpose-built for Next.js, providing automatic edge caching, instant rollbacks, and preview deployments for every git push. ISR (Incremental Static Regeneration) works seamlessly on Vercel with on-demand revalidation APIs and automatic cache invalidation across their global edge network. Edge Functions run your middleware in 30+ regions with sub-millisecond cold starts. This deployment demonstrates Next.js at its most optimized, with Vercel handling image optimization, analytics, and Web Vitals monitoring automatically.

Next.js 16

Next.js 16

VPS (Bun)

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The React meta-framework running on Bun runtime. Built by Vercel, Next.js supports SSR, SSG, ISR, and streaming—all configured per-route. This variant uses Bun runtime for potentially faster startup times and request handling. The App Router architecture brings React Server Components, nested layouts, and Server Actions. While Bun support for Next.js is unofficial, it works in practice and offers a comparison point for runtime performance. Ideal for teams wanting to benchmark Node.js vs Bun performance with their Next.js applications.

Performance Metrics

Lower is better for all metrics. Green indicates the faster framework.

Metric Next.js 16 Next.js 16 Winner
TTFB (p50) 44.7ms 0ms ▶
TTFB (p95) 44.86ms 0ms ▶
LCP (p50) 62ms 0ms ▶
LCP (p95) 70.2ms 0ms ▶
CLS 0 0 =
TBT 0 ms N/A -
LCP → TTFB N/A N/A -
LCP → Load Delay N/A N/A -
LCP → Load Duration N/A N/A -
LCP → Render Delay N/A N/A -
Performance Score 96 N/A -
SEO Score 100 N/A -
Accessibility Score 88 N/A -
Best Practices Score 100 N/A -

LLM Understanding (Claude Opus 4.5)

How efficiently Claude Opus 4.5 understands the codebase. Based on exploration + validation tests.

Metric Next.js 16 Next.js 16 Winner
Exploration Time 3883ms N/A -
Exploration Tokens 3963 N/A -
Files Examined 11 N/A -
Validation Accuracy 100% N/A -
Time Per File 353ms N/A -
Tokens Per File 3245 N/A -
Efficiency Score 43.28 N/A -

LLM Understanding (Claude Haiku 4.5)

How efficiently Claude Haiku 4.5 understands the codebase. Based on exploration + validation tests.

Metric Next.js 16 Next.js 16 Winner
Exploration Time 3029ms N/A -
Exploration Tokens 3991 N/A -
Files Examined 11 N/A -
Validation Accuracy 99% N/A -
Time Per File 275ms N/A -
Tokens Per File 3225 N/A -
Efficiency Score 55.84 N/A -

Build Metrics

Metric Next.js 16 Next.js 16 Winner
Bundle Size (JS) 613.3KB 642.6KB ◀
Bundle Size (CSS) 23.3KB 23.4KB ◀
Build Time 0s 0s =
Dependencies 18 19 ◀

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