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docs: record :sync latency budget from hardware measurement

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New docs/notes/sync-latency.md breaks down the measured ~16 s cold :sync
(Wi-Fi + SNTP + one TLS push), explains the optimistic-retry handshake saving,
the reconcile/last-writer-wins semantics, and why the rest is near the protocol
floor. Linked from the notes index, the docs index, and the Git row of the root
README.
This commit is contained in:
Julien Calixte
2026-07-11 17:04:02 +02:00
parent 92068f1cce
commit a700412773
4 changed files with 91 additions and 2 deletions
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docs/README.md
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@@ -31,5 +31,5 @@
| --- | --- |
| [`spikes.md`](spikes.md) | Rendering & UX spikes — display/UX risks proved outside the hardware stack. |
| [`postmortems/`](postmortems/README.md) | Bring-up debugging write-ups: what broke, the root cause, and the decisions that came out of it. |
| [`notes/`](notes/README.md) | Longer-form essays on the thinking behind specific choices. |
| [`notes/`](notes/README.md) | Longer-form essays on the thinking behind specific choices — e.g. where the ~16 s cold [`:sync`](notes/sync-latency.md) goes. |
| [`tradeoff-curves/`](tradeoff-curves/README.md) | Cost-vs-knob curves behind chosen defaults — energy, latency, memory. |