gmetais/sw-delta
An incremental cache for the web observed · 2026-08-28
Health v2 · maintenance only
23/100
- Activity 0
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4000
- days_rel: n/a
- days_push: 3658
- n_releases_24m: 0
Adoption not part of the score
1098 stars · 31 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
sw-delta is an incremental cache for the web that uses the Service Worker API to download only the delta (diff) between a cached file and its new version. It works client-side via a Service Worker that appends the cached version to requests, and server-side via implementations that compute and serve delta files.
Use cases
- reduce bandwidth for frequently updated static assets
- speed up websites with continuous delivery and file versioning
- avoid full re-downloads of barely changed JavaScript or CSS files
- implement delta updates in a browser cache
- improve web performance for repeat visitors
When to choose
- your site deploys new asset versions frequently and users revisit often
- you want a progressive enhancement that falls back to normal caching
- your audience is mostly on Service Worker-supporting browsers over HTTPS
When to avoid
- you need production-ready, widely supported tooling (the project is experimental and unmaintained since 2016)
- your users rely on browsers without Service Worker support
- you cannot modify server-side code to compute deltas
Facets
library · maturity experimental
caching http-client middleware web-development performance frontend browser service-worker delta-updates webperf incremental-download browser-cache nodejs web-server
2 sources
- readme: https://github.com/gmetais/sw-delta · fetched 2026-08-28 · 128b08fbee86
- registry_npm: https://registry.npmjs.org/sw-delta · fetched 2026-08-29 · 77f6dea1c8b9
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| gmetais/sw-delta | main | 23 |
For agents
markdown · JSON · MCP: product_card(name="gmetais/sw-delta")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem