WebSocket Fanout for Earnings Prints — MU Night Checklist

From the RT/SOFT engineering journal:

Micron (MU) reports fiscal Q4 FY2026 on Wednesday, Sep 30, 2026 after the close, with the call at 4:30pm ET. Company guidance from June pointed to revenue of $50B ± $1B and non-GAAP EPS of $31 ± $1; street chatter into the print sits near $50.6–51.1B / $31.3–31.5. The prior quarter (June 24 print) did $41.5B. The tape will obsess over FY27 Q1 guide, HBM/DRAM tightness, and SK Hynix / Samsung read-across.

Night-of checklist

1. Symbol shards — isolate MU / semis peers so a hot symbol cannot starve the book.
2. Backpressure — drop conflated ticks before you drop heartbeats.
3. Replay window — decide how many seconds of AMC tape you will rebuild for late subscribers.
4. Client budgets — main-thread work under a few milliseconds per frame; yield between paint.

Observability

Quiet VIX does not mean quiet single names. Chart reconnect rate and p99 fan-out separately from index vol.

Rehearse the burst on a Stock Picks paper session before you declare the stack ready.

Not financial advice. Verify claims independently.