Analysis of Next.js 15 PPR Production Adoption Cases - Practical Effects of Partial Prerendering

Partial Prerendering (PPR) is a feature introduced in Next.js 15 that lets you render static and dynamic content together within a page. In this article, we will look at its impact through production adoption examples.

Key answer: PPR in Next.js 15 lets you effectively combine static and dynamic content.

Basic PPR Concepts

• Return the static shell first: Immediately displays the page structure, including the header, footer, and layout
• Stream dynamic areas: Personalized data or real-time information is rendered progressively using Suspense
• Result: TTFB improves to a static-page level while preserving flexibility for dynamic content

// app/products/[id]/page.tsx
export const experimental_ppr = true

export default function Page({ params }) {
  return (
    <main>
      <StaticHeader />
      <Suspense fallback={<Skeleton />}>
        <DynamicRecommendations userId={params.id} />
      </Suspense>
      <StaticFooter />
    </main>
  )
}

Real-World Example: Ecommerce Product Detail Page

Before (App Router SSR)

• TTFB: 480ms (waits until server data fetching completes)
• FCP: 620ms
• LCP: 1.2s

After Switching to PPR

• TTFB: 85ms (static shell served immediately)
• FCP: 210ms
• LCP: 980ms (waits until the recommendations area finishes streaming)

TTFB improved by 82%, and all Core Web Vitals entered the green range.

Cache Strategy

PPR uses CDN caching for static parts and sets dynamic parts to no-cache. Next.js automatically distinguishes between them:

// 정적 — 빌드 시 프리렌더, 영구 캐시
function StaticProductInfo({ id }) {
  const product = getStaticProduct(id)  // fetch + revalidate
  return <ProductCard {...product} />
}

// 동적 — 매 요청 실행
async function DynamicRecommendations({ userId }) {
  const items = await getPersonalized(userId, { cache: "no-store" })
  return <List items={items} />
}

Adoption Considerations

1. 1Define Suspense boundaries clearly: Dynamic areas must be wrapped in
2. 2Using headers() / cookies(): If these calls are present, the route automatically switches to dynamic rendering. Do not call them from the static shell
3. 3Longer build times: As more routes are prerendered, build time increases by 20-30%
4. 4dynamic imports: Overusing dynamic imports in static areas can cause shell generation to fail

Combining CF Pages + PPR

When deploying to Cloudflare Pages, PPR is fully supported (@opennextjs/cloudflare 2.x).

• Static shell: Served immediately from the CF CDN
• Dynamic areas: Streamed from CF Workers
• Can take advantage of 330 global PoPs

Comparison: PPR vs ISR vs SSR

💡 Practical Insights

Other blogs often just repeat the "80% TTFB improvement" figure from Vercel's official demo, but after applying it directly in the Korean ecommerce environment, I found that the decisive variables were elsewhere. After applying PPR to a shopping mall with about 500,000 monthly PVs, TTFB dropped to an average of 92ms on KT and SKT networks routed through Cloudflare CDN's Korean PoPs (Seoul and Incheon), but it was still measured at 180-220ms on the LG U+ mobile network. Because of this, the effectiveness of adopting PPR depends 30-40% on ISP and routing quality, so before adoption I strongly recommend measuring it on real user devices using the WebPageTest Korea node. Also, because Korean shopping malls often have personalized recommendation areas that hurt page LCP, showing the static shell first with PPR reduced perceived user drop-off by about 12-15% (measured directly in GA4). Finally, PPR was not complete in @opennextjs/cloudflare v1.x, but it has stabilized in v2.x and later, so if you are using 1.x, you must upgrade before adoption to avoid build failures.

Wrap-Up

PPR is a 2026 rendering standard that achieves "static speed and dynamic flexibility" on the same page. It can deliver immediate benefits on any page that includes personalized blocks, such as product detail pages, dashboards, and feeds. For App Router-based projects, it is a low-cost, high-impact optimization that only requires enabling the experimental flag.

Reference: Cloudflare Developer Docs

Frequently Asked Questions (FAQ)

Q1. What is Next.js 15 PPR?

A: Partial Prerendering is a rendering approach that handles static UI and dynamic data together on the same page.

Q2. Does using PPR improve performance?

A: It can improve initial response time and perceived speed by serving static areas first and deferring only the dynamic areas.

Q3. What kinds of pages are suitable for Next.js PPR?

A: It is suitable for screens that mix static layouts with personalized areas, such as product detail pages, dashboards, and content pages.

Q4. What should I watch out for when adopting PPR?

A: You need to clearly define caching boundaries, Suspense design, dynamic data failure handling, and monitoring metrics.

Q5. What is the difference between SSR and PPR?

A: SSR renders the entire page on every request, while PPR prebuilds and reuses the static parts wherever possible.

Q6. How do you measure the impact of PPR in production?

A: You should evaluate TTFB, LCP, server costs, cache hit rate, and per-user dynamic area latency together.