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Differential updates

This page has moved to Delta patches.

The two terms refer to the same thing — the bsdiff-based delta pipeline that ships only the changed bytes of your JS bundle. See the Delta patches page for the full explainer, safety guarantees, and telemetry.

Quick summary​

  • Typical savings: 60–98% of bundle size.
  • Algorithm: bsdiff (BSD-2-clause reference implementation).
  • Signed: patch bytes are Ed25519-signed before bspatch runs.
  • Safe fallback: any failure drops back to the full bundle, silently. A PATCH_FALLBACK_TO_FULL telemetry event fires.
  • No configuration: enabled for every deploy automatically.
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