When deploying CesiumJS projects, the library's substantial size (~100MB) often slows CI builds. This analysis evaluates domestic CDN options for external Cesium loading to optimize deployment efficiency without compromising functionality.

Evaluation Criteria

  1. Speed: Domestic CDN prioritization
  2. Security: Mitigation of supply-chain risks
  3. Stability: Guaranteed service availability
  4. Version Coverage: Support for recent Cesium releases

CDN Assessment

1. BootCDN

  • URL: https://www.bootcdn.cn/
  • Cesium Version: 1.119.0 (as of 2025-01-03)

  • Assessment:

    • Speed: ★★★★☆
    • Stability: ★★★☆☆
    • Security: ★☆☆☆☆ (Notorious for historical poisoning incidents)
  • Verdict: Not recommended

2. Staticfile

  • URL: https://www.staticfile.org/
  • Cesium Version: Latest available

  • Assessment:

    • Speed: ★★★★☆
    • Stability: ★★★★☆
    • Security: ★★☆☆☆ (Past security incidents)
  • Verdict: Suitable for demos only

3. ByteDance CDN

  • URL: https://cdn.bytedance.com/
  • Cesium Version: 1.90.0

  • Assessment:

    • Speed: ★★★★★
    • Stability: ★★★★★ (Enterprise-backed)
    • Security: ★★★★☆
  • Verdict: Recommended for projects using ≤1.90

4. zstatic

  • URL: https://cdn.zstatic.net/libraries/cesium
  • Cesium Version: Latest (cdnjs mirror)

  • Assessment:

    • Speed: ★★★★★
    • Stability: ★★★☆☆ (Community-maintained)
    • Security: ★★★★☆ (SRI support)
  • Verdict: Viable but monitor sustainability

5. Webcache

  • URL: https://www.webcache.cn/
  • Cesium Version: Latest

  • Assessment:

    • Speed: ★★★★☆
    • Stability: ★★★☆☆ (Multi-CDN backend)
    • Security: ★★★☆☆ (Limited audit history)
  • Verdict: Conditionally usable

6. 7ED

  • URL: https://www.7ed.net/start/public-cdn.html
  • Cesium Version: Latest

  • Assessment:

    • Speed: ★★★☆☆
    • Stability: ★★☆☆☆ (Voluntary blacklisting policy)
    • Security: ★★☆☆☆
  • Verdict: Use with caution

7. JSDMirror

  • URL: https://cdn.jsdmirror.com/
  • Cesium Version: Latest (jsDelivr mirror)

  • Assessment:

    • Speed: ★★★★☆
    • Stability: ★★★☆☆
    • Security: ★★★☆☆
  • Verdict: Acceptable for non-critical projects

8. Snrat

  • URL: https://cdnjs.snrat.com/
  • Cesium Version: Latest

  • Assessment:

    • Speed: ★★★★☆
    • Stability: ★★★★☆ (Powered by Baishan Cloud)
    • Security: ★★★☆☆
  • Verdict: Currently viable

Implementation Recommendation

No public CDN fully satisfies all criteria (speed, security, versioning, stability). The optimal solution is deploying a self-hosted CDN:

  1. Purchase commercial CDN service (e.g., Alibaba Cloud CDN)
  2. Host Cesium builds internally
  3. Implement Subresource Integrity (SRI) checks

This approach ensures:

  • Version control
  • Performance optimization
  • End-to-end security control
  • Compliance with internal policies

Alternative CDN suggestions are welcomed for community knowledge sharing.