# Fluid compute now supports ISR background and on\-demand revalidation

**Published:** May 30, 2025 | **Authors:** Tom Lienard

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[Fluid compute](https://vercel.com/docs/functions/fluid-compute) now supports both background and on-demand [Incremental Static Regeneration (ISR)](https://vercel.com/docs/incremental-static-regeneration) across all Vercel projects.

This means ISR functions now benefit from Fluid's [performance and concurrency efficiency](https://vercel.com/docs/functions/fluid-compute#optimized-concurrency) with no config changes needed. If you’ve redeployed recently, you’re already using it.

Fluid compute reuses existing resources before creating new ones, reducing costs by up to 85% for high-concurrency workloads. It delivers server-like efficiency with serverless flexibility with:

- Optimized concurrency
- Scale from zero to infinity
- Minimal cold starts
- Usage-based pricing
- Full Node.js and Python support
- No infrastructure management
- Background tasks with `waitUntil`

[Enable Fluid](https://vercel.com/d?to=%2F%5Bteam%5D%2F%5Bproject%5D%2Fsettings%2Ffunctions%23fluid-compute&title=Go+to+Function+Settings) for your existing projects, and learn more in our [blog](https://vercel.com/blog/introducing-fluid-compute) and [documentation](https://vercel.com/docs/functions/fluid-compute).

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📚 **More updates:** [View all changelog entries](/changelog/sitemap.md) | [Blog](/blog/sitemap.md)