Head-to-Head Benchmark
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Core Web Vitals & CrUX Telemetry
Next.js (Headless) vs Traditional WordPress Speed Comparison
React Server Components and static edge generation vs PHP dynamic rendering.
React Full-Stack Framework
Next.js (Headless / React)
91
/100 Mobile
LCP
1.1s
INP
75ms
TTFB
85ms
Speed Advantages:
- Incremental Static Regeneration (ISR) serves pre-rendered HTML from edge nodes
- Zero database query latency on static article and catalog routes
- Next/Image automatically generates modern WebP/AVIF with perfect sizing
- Higher engineering complexity and separate backend CMS needed
- Client-side React hydration can cause TBT if components are unoptimized
PHP Dynamic CMS
Standard WordPress
68
/100 Mobile
LCP
2.4s
INP
160ms
TTFB
180ms
Speed Advantages:
- All-in-one ecosystem with plugins for non-technical users
- With full-page edge caching, can rival headless TTFB
- PHP runtime execution on uncached dynamic requests
- Plugin bloat can inject dozens of conflicting stylesheets
gtmetrix.in Engineering Verdict
Next.js delivers near-instant sub-second LCP and sub-100ms TTFB via static edge generation. However, a properly tuned WordPress setup on LiteSpeed Enterprise can achieve 90+ mobile scores at a fraction of the development cost.
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