P1 from docs/async_refactor.md. Measured on the dev stack: the port now accepts
connections 4 seconds after a restart rather than 121, and the worst loop lag
falls from 19,545ms to 526ms, with steady state between 0.2 and 0.6ms.
Seeding replayed years of history through on_bar, rebuilding every level from
scratch per bar and broadcasting each one to nobody. It now fills the store
quietly and derives price, ATR and the level set once at the end, from the
finished history. Alerts are deliberately not evaluated over replayed bars: a
level touched two years ago is not news, and firing on history is one way a
deploy re-alerts.
The seed was not all of it. Yahoo's first poll emits a whole day of minutes in a
single burst, each one taking the full live path, which was most of the
remaining twenty seconds. request_rebuild now coalesces to at most one rebuild
per 250ms and a background pass flushes anything deferred, so a burst costs a
handful of rebuilds instead of hundreds and the last bar is still never the one
dropped.
Verified unchanged after the change: bar counts across every timeframe, all five
daily moving averages with their full point sets, prior-day levels and VWAP. 125
python tests and 31 e2e tests pass.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Chris Amow
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