Date: 2026-08-13 08:09 Summary: image-optimizer headers show HTTP/3 miss path; Worker ~276ms; designed Cache-Control; zstd.
[question] 分析https://onlinefreetools.org/zh/tools/image-optimizer httpheader：HTTP/3 200 date: Thu, 13 Aug 2026 00:08:41 GMT priority: u=0,i content-type: text/html; charset=utf-8 server-timing: cfEdge;dur=37,cfOrigin;dur=0,cfWorker;dur=276 server-timing: cfExtPri cache-control: public, s-maxage=86400, max-age=0 server: cloudflare vary: Accept-Encoding report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=gAyALy9GBC%2FZKSqodKQ19pWkva3IaPksiUP%2F7oWADh83PCbFyPVdCJyAxwUr%2BSTI0iCGlLpL7yiX1uNoYM45jM78UGxdyWn2DwrGHyYN07hCGXiUuaTA4%2FhmSjOTBTOU9%2BWdzls%2B"}]} nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800} content-encoding: zstd cf-ray: a2a37c964de383bf-SEA alt-svc: h3=":443"; ma=86400
[try to solve]
Tool-page cold/miss: no HIT/age; Cache-Control is the Worker-designed max-age=0, s-maxage=1d; cfWorker≈276ms with cfOrigin=0 ≈ Cache miss → R2 get + gunzip (binding does not count as origin); edge zstd; HTTP/3 + priority/cfExtPri are protocol-layer and unrelated to cache. Same pattern as image-format-converter miss (~333ms). A refresh should HIT, drop Worker to ~tens of ms, and Browser Cache TTL may rewrite max-age to 14400.
[actions]
- Read-only header analysis