Two concrete latency wins found by measuring (server compute is 2-17ms; the time
is in the path, not the box):
- Admin panel fired its 6 API calls SEQUENTIALLY (await chain) — so it paid the
uncached origin round-trip six times back-to-back. Now one Promise.all batch.
This is the admin lag.
- /api/brief (the home "Gathering the good news…" content) wasn't edge-cached, so
a distant anonymous visitor triggered a Cloudflare→residential-origin pull.
Same global/shareable boundary as /api/feed: public s-maxage=45 when no
prefs/exclude, else private,no-store. (Needs /api/brief added to the CF cache
rule path list to take effect at the edge.)
Tests: test_brief_cache_boundary. 228 pytest + 11 vitest.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
thejayman77
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