Vercel cuts repository checkout by 20% and Git LFS downloads by 54%

Vercel has shortened the time its build infrastructure spends checking out repositories and downloading Git Large File Storage (LFS) assets, trimming preparation work that runs ahead of every deployment. According to the Vercel blog, the improvement is already live and applies automatically, with no action required from users.

What changed

Before a build can start, Vercel's build machines have to assemble a project's files: fetching the repository and, for projects that use Git LFS, pulling the large binary assets — images, video, audio, datasets — that Git keeps outside the main commit history. Because this step runs on every deployment, its cost repeats constantly, and for LFS-heavy repositories it can account for a meaningful share of total build time.

Vercel reports the following results, measured on build machines with more than two vCPUs:

• On average, build machines readied a project's files 20% faster.
• For LFS-enabled projects, the average drop was 54%, which Vercel estimates at roughly 13 seconds saved per deployment on this step alone.
• The 90th-percentile preparation time fell by 22%, meaning nine out of ten deployments now finish the step at or below that reduced time.

The post does not describe the engineering changes behind the numbers, only the measured outcomes. It also notes that the figures come from machines with more than two vCPUs, so projects building on smaller instances may see different results.

Why the percentile matters

The p90 figure is arguably the most telling of the three. Averages can be skewed by a mix of very small and very large repositories, but the 90th percentile reflects the experience nearer the slow end of the distribution — the builds that keep developers waiting. Cutting that by 22% suggests the speedup holds on larger checkouts and bigger LFS pulls, not just on small, trivial ones.

Why it matters

Build preparation is effectively a fixed tax on every deploy. Unlike compile time, which depends heavily on a project's own code and tooling, checkout and LFS download time is platform overhead that individual teams cannot reduce on their own. A 20% average cut, applied automatically to every deployment, saves time in aggregate without any engineering work from users.

The LFS number is the standout. At 54% — about 13 seconds per deployment — projects that store substantial binary assets in LFS benefit most, and teams running dozens of preview and production builds a day will feel the savings compound fastest.

The change also fits a broader pattern among deployment platforms: shaving fixed overhead in the build pipeline is one of the cheapest ways to improve perceived speed, because it shortens every customer's feedback loop without touching application code. For Vercel users the improvement is already in effect, and the company points readers to its Git deployment documentation for further details.