# GitHub Pages CDN Acceleration Catalog A catalogue of CDN and proxy services that can serve files from the `WebProbeBot.github.io` repository. Measurements were taken on **2026-06-10** from a single non-China test host; real-world latency varies significantly by client region and ISP. > **Live benchmark:** open [`speedtest.html`](../speedtest.html) to measure every endpoint listed below from your own network. --- ## 1. URL Template Quick Reference Using `hello.json` as the example file, the direct GitHub Pages URL is: ``` https://webprobebot.github.io/hello.json ``` To route the same file through any of the providers below, swap the prefix and follow each provider's path template: | Type | URL template (replace `hello.json` with your path) | |---|---| | GitHub Pages (origin) | `https://webprobebot.github.io/hello.json` | | GitHub raw (origin) | `https://raw.githubusercontent.com/WebProbeBot/WebProbeBot.github.io/main/hello.json` | | jsDelivr family (`/gh//@/`) | `https://cdn.jsdelivr.net/gh/WebProbeBot/WebProbeBot.github.io@main/hello.json` | | Statically (`/gh////`) | `https://cdn.statically.io/gh/WebProbeBot/WebProbeBot.github.io/main/hello.json` | | raw.githack (`////`) | `https://raw.githack.com/WebProbeBot/WebProbeBot.github.io/main/hello.json` | | GitHub raw proxy (`/`) | `https://gh-proxy.com/https://raw.githubusercontent.com/WebProbeBot/WebProbeBot.github.io/main/hello.json` | --- ## 2. Global CDNs (Recommended) ### 2.1 GitHub Pages direct (Fastly) - **URL:** `https://webprobebot.github.io/{file}` - **Architecture:** Official GitHub Pages on top of the Fastly global CDN. - **Stability:** ⭐⭐⭐⭐⭐ — this is where the repository is natively hosted. - **Latency:** 200+ POPs worldwide; the lowest baseline in most regions. - **When to use:** **The default. You usually don't need to add a CDN on top.** ### 2.2 jsDelivr - **URL:** `https://cdn.jsdelivr.net/gh/WebProbeBot/WebProbeBot.github.io@main/{file}` - **Architecture:** Multi-CDN (Cloudflare + Fastly + Bunny + GCore + an in-house Rust edge layer). In early 2026, jsDelivr added a dedicated mainland-China route. - **Stability:** ⭐⭐⭐⭐ — a 5+ hour expired-certificate incident in May 2024 and two outages of >30 minutes in late 2025 are publicly documented. - **Caching:** `@main` is cached for 12 hours; `@` / `@` is cached permanently. - **When to use:** Cross-continent distribution, embedding in third-party pages, or any case where you want long-lived immutable URLs. ### 2.3 Statically - **URL:** `https://cdn.statically.io/gh/WebProbeBot/WebProbeBot.github.io/main/{file}` - **Architecture:** Multiple CDN providers (Google Cloud / CloudFront / Cloudflare / Fastly / Bunny) but a primary data centre in Germany. - **Stability:** ⭐⭐⭐ — no major known incidents but global distribution is weaker than jsDelivr. - **When to use:** A reasonable secondary source when jsDelivr is unavailable. ### 2.4 raw.githack.com / rawcdn.githack.com - **URLs:** - Branch-tracking: `https://raw.githack.com/WebProbeBot/WebProbeBot.github.io/main/{file}` - Commit-pinned (permanent cache): `https://rawcdn.githack.com/WebProbeBot/WebProbeBot.github.io//{file}` - **Architecture:** Backed by Cloudflare; the successor to the now-defunct RawGit, running since 2013. - **Stability:** ⭐⭐⭐⭐ — 13 years of operation with no publicly known major incidents. - **When to use:** A reliable accelerator for `raw.githubusercontent.com` URLs. --- ## 3. jsDelivr Edge Backends When `cdn.jsdelivr.net` itself is unreachable, you can force traffic through one specific backend. **The path is identical to the canonical jsDelivr URL — only the host changes.** | Host | Backend | Use case | |---|---|---| | `testingcf.jsdelivr.net` | Cloudflare | Force a CF route | | `fastly.jsdelivr.net` | Fastly | Force a Fastly route | | `quantil.jsdelivr.net` | Quantil (Wangsu) | A China-focused edge | | `jsdelivr.b-cdn.net` | Bunny CDN | Force a Bunny route | --- ## 4. jsDelivr Mirrors in Mainland China `cdn.jsdelivr.net` lost its mainland-China ICP filing in late 2021 and has been intermittently affected since. Community-run mirrors expose the same path structure under different hostnames; you only need to swap the host. | Host | Operator | Status (2026-06-10) | Notes | |---|---|---|---| | `cdn.jsdmirror.com` | JSDMirror | ✅ Reachable | The most stable of the China-hosted options | | `jsd.onmicrosoft.cn` | Community | ✅ Reachable | Average latency | | `jsd.cdn.zzko.cn` | Community | ❌ **Currently unreachable** | A volunteer project — can disappear at any moment | ⚠️ **Community mirrors come and go without warning and should never be relied upon in production.** Use jsDelivr proper with an application-level fallback (see §7), or front the repo with a CDN you own. --- ## 5. GitHub raw Proxies (Not CDNs) These services proxy `raw.githubusercontent.com`. They are **not** CDNs in the traditional sense — there is no global edge network and no 12-hour cache like jsDelivr, so changes propagate immediately. | Host | Purpose | Notes | |---|---|---| | `gh-proxy.com` | Releases, archives, raw files, `git clone` | Widely used in China; relatively stable | | `ghproxy.net` | Same as above | A backup option | URL pattern: `https://gh-proxy.com/https://raw.githubusercontent.com////` **When to use:** `git clone` acceleration, release-asset downloads, and any case where you cannot tolerate jsDelivr's 12-hour cache delay. --- ## 6. Decision Tree ``` Personal or test workload? ├─ Yes → Use https://webprobebot.github.io/ directly. │ It is already on Fastly's global network and is the most reliable │ free option you can pick. Adding a CDN on top usually adds risk, │ not speed. └─ No (you really need acceleration) │ Audience primarily in mainland China? ├─ Yes → ① cdn.jsdmirror.com ② gh-proxy.com │ ③ Own ICP filing + a domestic CDN fronting GitHub Pages └─ No (global / outside China) │ Do you need an SLA? ├─ Yes → Switch hosting: Cloudflare Pages, Vercel, Netlify, │ or a paid CDN (CloudFront, Bunny, commercial Fastly). └─ No → ① cdn.jsdelivr.net + application-level fallback ② Secondary sources: Statically, raw.githack ``` --- ## 7. Application-Level Multi-Source Fallback (Recommended Pattern) **Don't stack CDNs (if jsDelivr is down, your site goes down with it). Instead, define multiple sources and fail over (the site stays up unless *every* source is down):** ```js const URLS = [ 'https://webprobebot.github.io/hello.json', // primary 'https://cdn.jsdelivr.net/gh/WebProbeBot/WebProbeBot.github.io@main/hello.json', // backup 1 'https://raw.githack.com/WebProbeBot/WebProbeBot.github.io/main/hello.json', // backup 2 ]; async function fetchWithFallback() { for (const url of URLS) { try { const r = await fetch(url, { signal: AbortSignal.timeout(3000) }); if (r.ok) return r.json(); } catch {} } throw new Error('all sources down'); } ``` --- ## 8. References - jsDelivr status page: - raw.githack FAQ: - gh-proxy: - JSDMirror: