# Reduced build times for large projects

**Published:** January 14, 2026 | **Authors:** Janos Szathmary, Andrew Healey 

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We shipped build system optimizations that reduce overhead for projects with many input files, large `node_modules`, or large build outputs.

Expensive disk operations (large file detection and folder size calculations) are no longer on the critical path for successful builds. These calculations now only run when a build fails, or when you enable the `VERCEL_BUILD_SYSTEM_REPORT` environment variable.

Builds complete 2.8 seconds faster on average, with larger builds seeing improvements of up to 12 seconds.

See the [builds documentation](https://vercel.com/docs/builds) for details.

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