The channel manager still felt uncached: its capacity read walked all 64
slots one-by-one on firmware that never rejects an out-of-range index
(the Waymarker), on every open, outside the session cache.
Two fixes for the two slot probes:
- read_channel_slots now stops after a run of MAX_CHANNELS consecutive
empty slots. The manager packs channels from slot 0 up, so an unbroken
empty run that long means every configured channel has been seen — safe
against within-capacity gaps, which can't reach that length. This cuts
every (re)probe on never-rejecting firmware from 64 reads to ~11, felt
after each channel edit (a mutation invalidates + reprobes).
- channel_capacity deliberately keeps walking to the firmware's rejection
(it must discover a larger rejecting firmware's real ceiling — the
empty-run guess would truncate an empty 12-slot device to 8). Its only
slow case is never-rejecting firmware, bounded instead by caching: a new
DeviceState.channel_capacity() holds it for the session (a hardware
constant, dropped only on reconnect) and prewarm warms it after login,
so the manager opens from cache like every other screen.
706 passed.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Jean-Pierre MartineauandClaude Opus 4.8
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