Nr 14 Performance Comparison

title: "Next.js vs Remix — Performance Comparison and Benchmarks" description: "Compare performance characteristics of Next.js and Remix including TTFB, LCP, TTI, bundle size, and real-world benchmark data." weight: 24 date: 2026-06-28 lastmod: 2026-06-28 tags: [frameworks, react]

Performance characteristics differ between Next.js and Remix due to their architectural choices. Each framework excels in different performance metrics.

What You'll Learn

You will understand the performance profiles of each framework, including Time to First Byte, Largest Contentful Paint, Time to Interactive, and bundle size impact.

Why It Matters

Performance directly affects user experience, SEO rankings, and conversion rates. Choosing the right framework for your performance priorities is critical.

Real-World Use

DodaTech chose Next.js for its marketing site (prioritizing LCP through static generation) and Remix for the admin dashboard (prioritizing TTI through progressive enhancement).

flowchart LR
    subgraph Metrics[Performance Metrics]
        A1[TTFB]
        A2[LCP]
        A3[TTI]
        A4[Bundle Size]
    end
    subgraph Next[Next.js Strengths]
        B1[Static: Fast TTFB]
        B2[ISR: Fast LCP]
        B3[Requires hydration for TTI]
        B4[RSC reduces bundle]
    end
    subgraph Remix[Remix Strengths]
        C1[Server render: Fast TTFB]
        C2[Streaming: Fast LCP]
        C3[Interactive before JS]
        C4[Minimal runtime overhead]
    end
    A1 --> B1
    A1 --> C1
    A2 --> B2
    A2 --> C2
    A3 --> B3
    A3 --> C3
    A4 --> B4
    A4 --> C4
    style Next fill:#121212,color:#fff
    style Remix fill:#1a1a2e,color:#fff

Time to First Byte (TTFB)

Next.js with static generation serves HTML from CDN instantly, achieving sub-100ms TTFB. Server-rendered pages have higher TTFB due to server processing time.

Remix always server-renders, so TTFB depends on server location and data fetching speed. CDN caching can significantly improve TTFB for Remix.

Largest Contentful Paint (LCP)

Next.js with ISR serves pre-rendered HTML for fast LCP. Server Components reduce client-side rendering, improving LCP.

Remix streams HTML progressively. The LCP is determined by the slowest content on the page. Streaming ensures content appears as soon as it is ready.

Time to Interactive (TTI)

Next.js requires JavaScript hydration for interactivity. Pages load visually but remain non-interactive until hydration completes.

Remix pages are interactive before JavaScript loads. HTML forms and links work natively. JavaScript progressively enhances rather than being required.

Bundle Size

Next.js Server Components reduce bundle size by keeping server-only code on the server. The App Router minimizes client JavaScript.

Remix has minimal runtime overhead. The framework's runtime is about 12KB gzipped. Components only ship the JavaScript they need.

Real-World Benchmark Comparison

For a typical data-heavy dashboard page, Remix often achieves better TTI because content is interactive before JavaScript loads. For a static marketing page, Next.js achieves faster LCP through ISR.

Common Mistakes

1. Measuring the wrong metric: TTFB matters for static content. TTI matters for interactive apps. Measure what matters for your use case.

2. Not testing on slow networks: Performance differences are more pronounced on slow networks. Always test with network throttling.

3. Ignoring the impact of third-party scripts: Analytics, ads, and tracking scripts affect performance in both frameworks. Audit third-party scripts.

4. Not optimizing images: Both frameworks benefit from image optimization. Next.js has built-in Image component. Remix requires manual optimization.

5. Assuming static is always faster: Static pages are fast initially but stale without revalidation. Server-rendered pages with CDN caching can match static performance.

Practice Questions

1. Which framework typically has better TTFB for static content?

Next.js with static generation or ISR serves HTML from CDN, typically achieving faster TTFB than server-rendered Remix.

2. Which framework typically has better TTI for interactive pages?

Remix, because pages are interactive before JavaScript loads. Next.js requires hydration for interactivity.

3. How does Remix achieve fast LCP?

Through streaming. Content renders progressively as data becomes available, improving perceived LCP.

4. What is the bundle size impact of each framework?

Next.js RSC reduces bundle size by keeping server code on the server. Remix has a minimal 12KB runtime overhead.

5. How does CDN caching affect Remix performance?

CDN caching with Cache-Control headers significantly improves Remix TTFB by serving cached responses from edge locations.

Challenge

Build the same application in both frameworks and run Lighthouse performance audits on both. Compare the results and identify which metrics each framework excels at.

Frequently Asked Questions

Mini Project

Build a simple application (blog with 5 pages and a contact form) in both frameworks. Deploy both to production and run WebPageTest and Lighthouse audits. Compare the results across different network conditions.

What's Next

Make your final decision on Which to Choose based on your project requirements.