Home ci 36. incremental-static-regeneration: Incremental Static Regeneration (ISR)

36. incremental-static-regeneration: Incremental Static Regeneration (ISR)

Last updated on Aug 05, 2025

Incremental Static Regeneration (ISR)

Overview

Incremental Static Regeneration (ISR) is a powerful feature that enables developers to update static content without redeploying their application. This approach enhances performance, reduces backend load, and speeds up build times.

Table of Contents

  1. Next.js (/app)
  2. Benefits
    • Better Performance
    • Reduced Backend Load
    • Faster Builds
  3. Supported Frameworks
    • Next.js
    • SvelteKit
    • Nuxt
  4. Getting Started
  5. Comparison with Cache-Control Headers
  6. Pricing and Usage

Next.js (/app)

ISR is seamlessly integrated with Next.js, allowing developers to optimize static page responses and implement on-demand revalidation.

Benefits

  • Better Performance: Caches static content globally for faster access.
  • Reduced Backend Load: Reduces server load by serving cached content directly from the edge.
  • Faster Builds: Enables incremental builds that only update necessary parts of the application.

Supported Frameworks

ISR works out-of-the-box with popular frameworks like Next.js, SvelteKit, and Nuxt, ensuring a smooth implementation process.

Getting Started

  1. Set Up ISR: Configure your framework to use ISR for static content.
  2. Define Cache Rules: Specify which pages or components should be cached.
  3. Implement Revalidation: Use on-demand revalidation to update cached content when needed.

Comparison with Cache-Control Headers

  • ISR: Offers automatic support for stale-if-error and stale-while-revalidate, simplifying cache management.
  • Cache-Control: Requires manual configuration and can be complex to implement across frameworks.

On-Demand Revalidation Limits

On-demand revalidation is scoped to specific domains and deployments, ensuring that subdomains or other deployments are not affected by revalidation requests.

Pricing and Usage

ISR pricing is based on usage metrics such as function invocations, reads, writes, and Fast Origin Transfer. Monitor usage to optimize costs effectively.

More Resources

  • Next.js Caching Docs: For detailed implementation guidance.
  • Epycbyte Documentation: Explore additional resources for optimizing performance with ISR.