Two Learning Center performance pages 404 with no redirect (brotli-vs-gzip, TTFB glossary)

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#33,102 1 comentario 0 reacciones 8 asignados Ver en GitHub

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@smarsh-cf ya está trabajando en esto.

Desde el 29/8/2026.

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Descripción

content:edit documentation product:reference-architecture product:rules product:speed
Existing documentation URL(s)

The two broken pages — note these are www.cloudflare.com/learning, not developers.cloudflare.com. See "Additional information" below.

Suggested redirect targets, all currently live on the developer docs:

What changes are you suggesting?

Both of these Learning Center URLs return 404 with no redirect:

  • https://www.cloudflare.com/learning/performance/brotli-vs-gzip/
  • https://www.cloudflare.com/learning/performance/glossary/time-to-first-byte-ttfb/

Neither appears in https://www.cloudflare.com/sitemap.xml, which currently lists 33 URLs under /learning/performance/. So the content looks removed rather than moved.

Both URLs are still widely linked from outside Cloudflare, and both are the kind of page someone lands on mid-investigation — "should I use Brotli or gzip" and "what counts as a good TTFB" are among the most common questions people arrive with.

Suggested fix: 301s to the live equivalents, which are all on the developer docs now. That would repair the dead links without needing the Learning Center articles rewritten.

Dead URL Suggested target
/learning/performance/brotli-vs-gzip/ https://developers.cloudflare.com/speed/optimization/content/compression/ — covers the per-plan default algorithm; https://developers.cloudflare.com/rules/compression-rules/ covers choosing the Brotli/gzip/Zstandard order
/learning/performance/glossary/time-to-first-byte-ttfb/ the "time to first byte (TTFB)" entry at https://developers.cloudflare.com/glossary/, or https://developers.cloudflare.com/speed/troubleshooting/slow-website/ for the TTFB target table

If restoring or rewriting the Learning Center articles is preferred over redirecting, that works too — the main thing is that neither URL currently resolves to anything.

Additional information

On filing this here: I couldn't find any feedback route for www.cloudflare.com/learning. Those pages carry no "Was this helpful?" control, no edit link and no report link, and the footer offers only Contact sales / Support / Report abuse / Report a security issue. I understand this repo covers developers.cloudflare.com only — if there's a better home for Learning Center content bugs, please point me at it and I'll move this. If there isn't one, that might itself be worth fixing.

Minor, while I'm here: https://www.cloudflare.com/learning/cdn/what-is-caching/ says "335+ PoPs", while https://developers.cloudflare.com/reference-architecture/architectures/cdn/ says "hundreds of cities worldwide" alongside 405 Tbps and "95% of the world's Internet-connected population within 50 ms". Not a contradiction, but the Learning Center figure is both more precise and probably staler, and the two read oddly side by side.

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